HOMEWORK FOR LAB 6: IMPULSE AND MOMENTUM

Please list the members of your group:

Question 1: Find the impulse of the force shown on the force–time graph below. Explain how you found your answer.

Question 2: An object of mass 2.5 kg is moving in the negative x direction at a speed of 2.0 m/s. It experiences the force shown above for 3 S. What is the final velocity after the object has experienced the impulse? show your calculations.


Copyright © 2018 John Wiley & Sons, Inc.

HOMEWORK FOR LAB 6: IMPULSE AND MOMENTUM

A ball of mass 1.5 kg is thrown upward. It leaves the thrower’s hand with a velocity of 10 m/s. The following questions refer to the motion after the ball leaves the thrower’s hand. Assume that the upward direction is positive. show all calculations.

Question 3A: How long does it take for the ball to return to the thrower’s hand?

Question 3B: What is the final velocity of the ball just before it reaches the hand?

Question 3C: What is the change in momentum of the ball from the moment it leaves the hand until right before it reaches the hand?

Question 3D: What is the impulse calculated from the change in momentum?

Question 3E: What is the average force acting on the ball? What is the origin of this force?

HOMEWORK FOR LAB 6: IMPULSE AND MOMENTUM

After the ball in Question 3 hits the thrower’s hand, it comes to rest in a time of 0.25 s.

Question 4A: What is the net impulse exerted on the ball by the hand?

Question 4B: What is the average force exerted by the hand on the ball? Hint: Don't forget the gravitational force.

A bouncy ball of mass 0.05 kg is dropped from a height of 10 cm above a table top. It bounces off the table and rises to the same height.

Question 5: Choose which graph below best represents the force of the table top on the ball if the positive direction is upward. The vertical axis is the force in N and the horizontal axis is time in seconds.

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HOMEWORK FOR LAB 6: IMPULSE AND MOMENTUM

Question 6: Calculate the impulse exerted on the bouncy ball. show your work.

Question 7: The bouncy ball is now replaced by a clay ball the same size and mass. The ball is dropped from the same height and it sticks to the table. Describe the shape of the force vs. time graph for the force exerted on the ball by the table.

Question 8: Calculate the impulse exerted on the clay ball and compare it to that with the bouncy ball. Which is larger or are they both the same? Explain.

HOMEWORK FOR LAB 6: IMPULSE AND MOMENTUM

Question 9: Suppose that the clay has twice the mass and is dropped from the same height. Compare the impulse exerted on the ball by the table to that with the smaller clay ball. Explain your answer.

Question 10: Suppose that the original clay ball is dropped from twice the height. Compare the impulse exerted on the ball by the table to that for the smaller height. Explain your answer.

ALL DONE!

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