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dimulka [17.4K]
2 years ago
5

The principles that you will examine in this lab can be illustrated by studying a falling bucket. Imagine a frictionless pulley

in the shape of a solid cylinder of unknown mass M and radius 0.125 m that is used to draw water from a well. A bucket of mass 1.5 kg is attached to a cord wrapped around the cylinder. The bucket starts from rest at the top of the well and falls for 2.5 s before hitting the water at a distance of 6 m below the top of the well. Neglect the mass of the cord.
The principles that you will examine in this lab c

-What is the linear acceleration of the falling bucket?

Hint: remember that h=(1/2)at^2 ? a=2h/t^2

-What is the angular acceleration of the rotating pulley?

-What is the tension in the cord?

-What is the value of the torque that is applied to the pulley by the bucket hanging on the cord? Use the tension from the previous question.

-Find the moment of inertia of the rotating pulley using the torque and the angular acceleration.

-Calculate the mass of the pulley using the moment of inertia.

-What is the change in the potential energy of the bucket from the top of the well to the water level?

-What is the linear velocity of the falling bucket just as it hits the water?

-What is the angular velocity of the rotating pulley just as the falling bucket hits the water?Use the relation between the angular velocity and the linear velocity.

-What is the angular momentum of the rotating pulley just as the falling bucket hits the water?Use the moment of inertia and the angular velocity of the pulley.

-What is the kinetic energy of the falling bucket just as it hits the water?

-What is the kinetic energy of the rotating pulley just as the falling bucket hits the water?

-What is the total kinetic energy of the falling bucket and the rotating pulley just as the falling bucket hits the water?Give your answer to 3 sig figs.

-Is the total kinetic energy smaller than, equal to, or larger than the magnitude of the potential energy change?Ignore small differences in the least significant digit.

KE is smaller than ?PE

KE is equal to ?PE

KE is larger than ?PE

-If the pulley were not frictionless, would the total kinetic energy be smaller than, equal to, or larger than the magnitude of the potential energy change?

KE would be smaller than ?PE

KE would be equal to ?PE

KE would be larger than ?PE
Physics
1 answer:
Masteriza [31]2 years ago
5 0

Answer:

KE would be greater than PE

Explanation:

I found that answer

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Zigmanuir [339]

(a) The object moves with uniform velocity from A to B.

(b) The object moves with constant velocity from B to C.

(c) The object moves with increasing velocity from C to D.

<h3>Velocity of the object from point A to B</h3>

V(A to B) = (6 - 0)/(4 - 0) = 1.5 m/s

<h3>Velocity of the object from point B to C</h3>

V(B to C) = (6 - 6)/(11 - 4) = 0 m/s

<h3>Velocity of the object from point C to D</h3>

V(C to D) = (7 - 6)/(12 - 11) = 1 m/s

final velocity = 1 + 1.5 m/s = 2.5 m/s

Thus, we can conclude the following;

The object moves with uniform velocity from A to B.

The object moves with constant velocity from B to C.

The object moves with increasing velocity from C to D.

Learn more about velocity here: brainly.com/question/6504879

#SPJ1

4 0
2 years ago
You are bungee jumping from a bridge. Initially, while you are falling the slack bungee cord isn’t exerting any forces or torque
harina [27]

Answer:

he fall movement we see that both the force is different from zero, and the torque is different from zero.

When analyzing the statements the d is true

Explanation:

Let's pose the solution of this problem, to be able to analyze the firm affirmations.

When the person is falling, the weight acts on them all the time, initially the rope has no force, but at the moment it begins to lash it exerts a force towards the top that is proportional to the lengthening of the rope.

The equation for this part is

                 Fe - W = m a  

                 k x - mg = m a

As the axis of rotation is located at the top where they jump, there is a torque.

What is it

                Fe y - W y = I α

angular and linear acceleration are related

       a = α r

       Fe y - W y = I a / r

In the fall movement we see that both the force is different from zero, and the torque is different from zero.

When analyzing the statements the d is true

4 0
2 years ago
Heat moves from hot to cold either through air or liquid <br>​
KonstantinChe [14]

Answer:

both

Explanation:

because when it is hot in summer 5hat is the air and the sund u can warm things up and then it get hot

5 0
2 years ago
How do helmets protect your head? a. By creating a large area to spread out the pressure of a blow to your head. b. By focusing
Andru [333]
Your answer is A.

I hope this helps
5 0
2 years ago
Read 2 more answers
A mechanic uses a jack to lift up a car. He exerts a force of 11,000 N at a distance of 3m from the axis of rotation. How much t
pshichka [43]

Answer:

<h2>The amount of torque put on the car is 33,000Nm</h2>

Explanation:

Formula for calculating torque is expressed as T = rFsin\theta\\ where;

r is the radius of the  of the arm of the jack = 3m

F is the force exerted = 11000

\theta\\ is the angle of rotation = 90°

On substituting;

T = 3*11000sin90^{o} \\T = 3*11000 (sin90^{o} =1)\\T = 33000Nm

6 0
3 years ago
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