25pts

When Joel is riding his bicycle, he and the bicycle have a combined mass of 91.4 kg. The coefficient of kinetic friction between the bicycle's tires and the road is 0.61. If the bicycle was to skid to a stop, what would the force of friction be while the bicycle was sliding?
Ff=897 N
Ff=443 N
Ff=546 N
Ff=55.8 N

Three reasons why it may be difficult to accelerate the bookcase are;

1) Inertia that acts on the book case

2) Frictional force that prevents the book case from moving

3) The weight of the book  case.

We know that the Newton law states that a body would tend to remain at a state of rest or uniform motion unless it is acted upon by unbalanced forces. When the book lies without movement it is acted upon by its weight and the reaction which are exactly balanced. The inertia is the reluctance of the book to move.

As the book begins to move when pull, the friction that is acting on the pull would also militate against the forward motion of the book as it acts in the opposite direction.

Learn more about frictional force:https://brainly.com/question/1714663

#SPJ1

The volume flow rate at which the water flows is 0.0188 m³/s

Since the horizontal pipe 10.0 cm in diameter has a smooth reduction to a pipe 5.00 cm in diameter and If the pressure of the water in the larger pipe is 8.00 × 10⁴ Pa and the pressure in the smaller pipe is 6.00 × 10⁴ Pa, since we require the rate at which water flows through the pipe, we use Bernoulli's equation at constant height to find the speed of flow.

Bernoulli's equation governs flows through pipes. It is given by

P₁ + ρgh₁ + 1/2ρv₁² = P₂ + ρgh₂ + 1/2ρv₂² where

With h₁ = h₂, the Bernoulli's equation becomes

P₁ + 1/2ρv₁² = P₂ + 1/2ρv₂²

Using the volume flow rate equation

Q = A₁v₁ = A₂v₂ where

So, A₁v₁ = A₂v₂

(πd₁²/4)v₁ = (πd₂²/4)v₂

d₁²v₁ = d₂²v₂

Making v₂ subject of the formula, we have

v₂ = d₁²v₁/d₂²

v₂ = (d₁/d₂)²v₁

Substituting v₂ into the Bernoulli equation, we have

P₁ + 1/2ρv₁² = P₂ + 1/2ρv₂²

P₁ + 1/2ρv₁² = P₂ + 1/2ρ(d₁/d₂)⁴v₁²

Making v₁ subject of the formula, we have

1/2ρv₁² - 1/2ρ(d₁/d₂)⁴v₁² = P₂ - P₁

1/2ρ[1 - (d₁/d₂)⁴]v₁² = P₂ - P₁

v₁² = √{2(P₂ - P₁)/ρ[1 - (d₁/d₂)⁴]}

Given that

Substituting the values of the variables into the equation, we have

v₁ = √{2(P₂ - P₁)/ρ[1 - (d₁/d₂)⁴]}

v₁ = √{2(6.00 × 10⁴ Pa - 8.00 × 10⁴ Pa)/1000 kg/m³[1 - (10.0 cm/5.0 cm)⁴]}

v₁ = √{2(- 2.00 × 10⁴ Pa)/1000 kg/m³[1 - 2⁴]}

v₁ = √{(- 4.00 × 10⁴ Pa)/1000 kg/m³[1 - 8]}

v₁ = √{(- 4.00 × 10⁴ Pa)/1000 kg/m³[-7]}

v₁ = √{(40.0 × 10³ Pa)/7 × 10³ kg/m³}

v₁ = √{(40.0/7 Pam³/kg}

v₁ = √{5.7143 Pam³/kg}

v₁ = 2.39 m/s

Since the volume flow rate Q = A₁v₁ = (πd₁²/4)v₁

Given that

Substituting the values of the variables into the equation, we have

Q = (πd₁²/4)v₁

Q = π(0.1 m)²/4 × 2.39 m/s

Q = π × 0.01 m²/4 × 2.39 m/s

Q = π × 0.0239 m³/s/4

Q = 0.0751 m³/s ÷ 4

Q = 0.0188 m³/s

So, the water flows at a rate of 0.0188 m³/s

Learn more about volume flow rate here:

https://brainly.com/question/28182675

#SPJ1

We first apply the data to the problem.

Data:

Then, we apply the formula that is.

Formula:

Finally we develop the problem.

Developing:

The car travels a distance of 50 meters.

The horizontal component of the force pushing him forward is 37 N.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Frictional force due to ice, F =   μN

Normal force N = mg = 75*9.8 = 735 N

Frictional force = 0.05*735 = 36.75 N

Coefficient of friction, μ for ice is 0.05

The horizontal component of the force pushing him forward is 37 N.

To learn more about force refer to the link:

brainly.com/question/13191643

#SPJ5

P = I²R = (10 A)² (120 Ω) = 120 000 Watts = 120 kW

Explanation:

a straight line graph shows a linear relationship between and x and y, where if gradient is positive then it's a positive linear relationship (where when factor increases the other would also increase). if the the gradient is negative then it's a negative linear relationship where when factor decreases the other would also decrease.

the slope of the line is the gradient which can be determined using the equation,

gradient = y difference ÷ x difference

respective to which factor is presented by each axis.

hope it helps. :)

Answer:

Explanation:

Given:

m₁ = 8 kg

V₁ = 3 m/s

m₂ = 2kg

V₂ = 0

V₂' = 6 m/s

__________

V₁' - ?

m₁V₁ + m₂V₂ = m₁V₁' + m₂V₂'

8·3 + 2·0 = 8·V₁'  + 2·6

24 = 8·V₁' + 12

24 - 12 = 8·V₁'

12 = 8·V₁'

V₁' = 12 / 8 = 1.5 m/s

Answer:

M1 V1 + M2 V2 = (M1 + M2) V

Conservation of momentum where V is speed of combined vehicles

V = (1500 * 10 + 1500 * 5) / (1500 + 1500) = 7.5 m/s

When there is a power outage, people and companies utilize generators to supply electricity. Since gasoline has the lowest specific heat, it requires the least amount of energy.

Voltage, or the potential of a charge to produce energy, and current, or the flow of electric charge, are the two main components of electric power. Any ratio of current and voltage values can provide a given amount of power.

Given that it is created by electrical means, electricity qualifies as a power. It can be referred to as "electric power" in that meaning.

Watts

Electrical power is measured in Watts and Kilowatts. James Watt, the creator of the steam engine, was honored with the designation Watts, which are units used to measure the power of electricity. One Watt electrical power measured in units of one amp at one volt of pressure.

To know more about  electrical power visit:-

https://brainly.com/question/27442707

#SPJ1

The kinetic energy of the blocks that is lost due to the collision is 8.64 J.

The initial speed of the smaller block is calculated by applying the following equation.

m₁u₁  +  m₂u₂ = v(m₁ + m₂)

where;

9u₁ + 27(0.5) = 0.9(9 + 27)

9u₁ + 13.5 = 32.4

9u₁ = 18.9

u₁ = 18.9/9

u₁ = 2.1 m/s

The total initial kinetic energy of the blocks is calculated as follows;

K.Ei = ¹/₂m₁u₁²  +  ¹/₂m₂u₂²

K.Ei = ¹/₂(9)(2.1)²    +    ¹/₂(27)(0.5)²

K.Ei = 23.22 J

The final kinetic energy of the blocks is calculated as follows;

K.Ef = ¹/₂(m₁ + m₂)v²

K.Ef = ¹/₂(9 + 27) x (0.9)²

K.Ef = 14.58 J

The change in the kinetic energy of the block is calculated as;

ΔK.E = K.Ef  -  K.Ei

ΔK.E = 14.58 J   -   23.22 J

ΔK.E = -8.64 J

Learn more about kinetic energy here: https://brainly.com/question/25959744

#SPJ1

Answer:

123.6 N

Explanation:

I will try to answer this

Find height of the ball

  9. 5   - 9.5 cos 35  = 1.72 m   of potential energy

   PE = mgh    will be converted to KE at the bottom of the swing

     mgh = 1/2  m v^2

    sqrt( 2 gh )  = v      at the bottom = 5.81  m/s

then the tension is the mass times the acceleration of gravity PLUS the acceleration of circular motion  v^2 / r

F = ma

F = 9.25 kg ( 9.81 m/s^2 + 5.81^2 / 9.5 m/s^2 ) = tension = 123.6 N

(Let me know if this is incorrect, and I will research a bit more)

The maximum height reached by the frog is 0.185 m.

The maximum height reached by the frog is calculated by applying the following kinematic equation.

H = u² sin²θ / 2g

where;

H = (4.5²  x  (sin 25)²) / (2 x 9.8)

H = 0.185 m

Thus, the maximum height reached by the frog depends on the initial velocity and angle of the frog's projection.

Learn more about maximum height here: https://brainly.com/question/12446886

#SPJ1

B is your answer, hope it helps.

The acceleration of skateboard on road A will be 7.74 [tex]m/s^{2}[/tex]

The acceleration of skateboard on road B will be 3.87 [tex]m/s^{2}[/tex]

The acceleration of skateboard on road C will be 9.68 [tex]m/s^{2}[/tex]

force = mass * acceleration

mass1 = 62 kg

force1 = 480 N

acceleration1 = force / mass

                     = 480 / 62 = 7.74 [tex]m/s^{2}[/tex]

mass2 = 62 kg

force2  = 240 N

acceleration 2  = 240 / 62 = 3.87  [tex]m/s^{2}[/tex]

mass 3 = 62 kg

force 3  = 600 N

acceleration 3  = 600 / 62  = 9.68  [tex]m/s^{2}[/tex]

To learn more about force here :

https://brainly.com/question/7362815

#SPJ1    

Answer:

P = P1 + P2     where P is a vector quantity

P1 = P2 = .10 kg * 30.0 m/s = 3 kg-m/sec

P = (p1^2 + p2^2)^1/2      add vectors and find magnitude of resultant

p = (3.0^2 + 3.0^2)^1/2 = 4.24      length of resultant vector

Since vectors are at right angles p is the length of the hypotenuse

tan θ = 3.0 / 3.0 = 1      where theta is measured with respect to the positive x-axis and will be below that axis

θ = tan^-1 1 = 45 deg      (45 degrees below positive x-axis)

One can find the value of tan θ from the length of the x-y vectors and from tan θ obtain θ

The amount of current flowing in the wire, given that it has a resistance of 25 Ω and connected to a 3.0 V is 0.12 A

From Ohm's law, we understood that the voltage, current and resistance are related according to the following formula:

Voltage (V) = Current (I) × resistance (R)

V = IR

With the above formula, we can obtain the current in wire. Details below.

The following data were obtained from the question:

Thus, the current can be obtained as follow:

Voltage (V) = Current (I) × resistance (R)

3 = Current × 25

Divide both sides by 25

Current = 3 / 25

Current = 0.12 A

Thus, we can conclude that the current in the wire is 0.12 A

Learn more about current:

https://brainly.com/question/23754329

#SPJ1

The physical weathering of rock by the repeated thawing of water is likely to happen more quickly than the physical weathering of rock by plant roots.

How does repeated thawing of water causes the rock to weather?

First, the physical weathering of rock is usually caused by water (which can come from rain or erosion), ice, plant roots, and even animals. These agents ensure the rock is broken down into smaller particles or sizes.

So, the thawing of water ensures continuous freezing and melting of water which allows water in the form of ice to build up in the cracks of rocks after expanding on freezing. This makes the rock breaks apart due to the pressure that is built in the crack.

However, physical weathering from the root of plants is slower compared to that of the repeated thawing of water. Though both processes needed time, but it will take more time for the roots in a crack. For the plant roots to get cracks to grow into, it needs repeated thawing of water to create that crack or other agents of rock weathering to create the crack.

In summary, repeated thawing of water makes rocks more susceptible to chemical and biological weathering. The weathering of rock by plant roots will need the plant to grow and survive in the first place, which might take more time.

Learn more about physical weathering here: https://brainly.com/question/14028628

#SPJ1

mvr³  is the angular momentum of the hoop about its center of mass

L=mvr=Iω

L= angular momentum

m= mass

v=velocity

r= radius

L=mvr

L=mr²×r×v

L=mvr³

A characteristic known as angular momentum describes the rotating inertia of an item or set of objects when they are moving along an axis that may or may not pass through them. The Earth possesses spin angular momentum from its daily rotation around its axis and orbital angular momentum from its yearly revolution around the Sun. Since angular momentum is a vector quantity, its full representation calls for the identification of both a magnitude and a direction. An object in orbit has an angular momentum that is proportional to its linear momentum times the perpendicular distance r from the center of rotation to a line drawn through the center of gravity of the object, or just mvr.

To know more about   angular momentum visit : https://brainly.com/question/15104254

#SPJ1

The fact that Pedro likes to talk to people means that Pedro is an extrovert.

We define an extrovert as a person that is able to interact very much freely with other people. It is one of the kinds of temperaments that a person can have. We know that people that can have very different temperament types and these are the things that determine the behavior of a person.

Thus, a person acts in accordance with the kind of temperaments that a person has. Just as we can see in the person of Pedro. We are told in his case that the person Pedro would always like to talk with is friends and the team mates which suggests that he must like to associate with other people.

From our definition of the person of Pedro in the lines that are above, we can say the Pedro is an extrovert.

Learn more about extrovert:https://brainly.com/question/22721857

#SPJ1

The distance traveled by the object during the time interval from t = 2 s to t = 3s is 3m. Option C.

From the formula d = ½ at2 the displacement is proportional to the square of time. If you run twice as far from the rest, the displacement will quadruple (or 4m). Since the object has already moved 1 m in the first second, the remaining 3 m have moved in time intervals from 1 to 2 seconds.

This means that the velocity and net force in the direction normal to the plane must be zero. Assuming the plane is frictionless means that the plane exerts no force on the block parallel to the surface. For angular frictionless tilt, the acceleration is the result of the gravitational acceleration multiplied by the sine of the angle.

Learn more about A frictionless incline here:-https://brainly.com/question/13538001

#SPJ9

The length of the axes of the eclipse are 1.25cm and 10cm.

With the formula, F = (mv²)/r

where F = force

m = mass

v = velocity and

r = diameter/length

To find how long the axes of the eclipse are at an outward force of 10N and a similar force of 1.25N:

For F₁ = 10N

10 = (0.5 x 5²)/r

10 = 12.5/r, cross multiply

r = 12.5/10 = 1.25cm

For F₂ = 1.25N

1.25 = (0.5 x 5²)/r

1.25 = 12.5/r, cross multiply

r = 12.5/1.25 = 10cm

The lengths of the eclipse are found by dividing the product of the mass and velocity by the first and second forces to get 1.25cm and 10cm

Learn more on force here: https://brainly.com/question/12970081

#SPJ1

The gravitational potential energy gained by the body of mass 52 kg when climbing a stairs is 1274 J.

Gravitational potential energy is the energy of a body due to its position in the gravitational field.

To calculate the gravitational potential energy, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the gravitational potential energy of the body is 1274 J.

Learn more about gravitational potential energy here: https://brainly.com/question/24933254

#SPJ1

N is less than mg hence, It slides with constant  acceleration a under the action of two forces

The rate at which an item changes its velocity is known as acceleration, a vector variable. If an object's velocity is changing, it is accelerating. A moving object can occasionally alter its velocity by the same amount every second. a moving object that changes its speed by 10 m/s per second. Since the velocity is changing by a fixed amount every second, this is known as a constant acceleration.

It is important to distinguish between an item with a constant acceleration and one with a constant velocity. Be not deceived! An object is accelerating if its velocity is changing, whether by a fixed amount or a variable quantity. Additionally, a moving item with a constant speed is not accelerating.

To know more about  acceleration visit : brainly.com/question/3046924

#SPJ1

The angular acceleration of the wheel 0.16 rad/sec².

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.

The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.

Given in the question,

angular acceleration = 4/25

angular acceleration = 0.16 rad/sec²

The angular acceleration of the wheel 0.16 rad/sec².

To learn more about acceleration refer to the link:

brainly.com/question/12550364

#SPJ1

Answer:If the momentum is large on the other hand, you will cause turbulences that make the water splash , So Yes

Explanation:

The  argument by analogy (regarding other minds) and the objection against it is that:

Russell thinks there are other minds due to the fact that he can see behaviors in others that are similar to his own without giving them any conscious thought. He contends that thoughts are the root of all behavior, but what happens when a thought results in a reaction that one forces upon oneself.

Therefore, the traditional philosophical defense of the existence of other minds is the argument from analogy, which, as persuasively put forth by John Stuart Mill, a 19th-century empiricist, claims that since one's body and outward behavior are observably similar to those of others, one is justified by analogy in thinking that others have feelings similar to one's own and are not just automatons with similar bodies and outward behaviors.

Learn more about analogy from

https://brainly.com/question/28739121
#SPJ1

Answer:

b. Is the answer because It depends on what Galileo Galilea thinks :,-)

Galileo most likely have to do this in order to convince other scientists that his observations were correct, is repeats the experiment multiple times in front of witnesses. So the correct option is C.

Galileo probably had to repeat his tests multiple times in front of witnesses to present convincing proof to other scientists rather than keeping the results to himself, making an object fall faster, or just publicizing his results.

Scientific certainty is produced by repeating an experiment and observing the outcomes, which is still regarded as a key component of the scientific method in modern times.

Galileo would have benefited from documenting his procedures and conclusions in a way that allowed other scientists to replicate his experiment and confirm his findings, even though it wasn't mentioned in your multiple-choice answers.

This concept is largely covered by the peer-review procedure used in contemporary science. So the correct option is C.

Learn more about Scientific Verification link is here:

brainly.com/question/12021848

#SPJ2

The behavior of a clock sitting on the surface of a planet with a surface gravity of one g says that rim clock always runs slower

Gravity is the principal force acting on a body in projectile motion when it is hurled at a specific angle. The power with which the body is originally thrown determines maximum height and how far it will travel. When an object moves in a projectile motion, there are numerous instances in daily life. For instance, a basketball player will obliquely toss the ball at a specific angle towards the direction of the hoop. The ball then rises and descends like a missile in the direction of the basket. Other sports like cricket, football, and soccer may demonstrate this.

To know more about  Gravity visit :https://brainly.com/question/13810323

#SPJ1