APPC Momentum 3/3

Open Ended

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Momentum Group Quiz Review

Redo 10 wrong questions to raise quiz score to 12/15

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10) Analyze these both before & after the collision:

a. both momenta

b. relative velocities

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7) Calculate kinetic energy that was transferred/lost

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13) Analyze the following for Trials 1&2

a. Work

b. Impulse

Hint: How are Work and Impulse represented on the graph?

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5) Analyze the velocities of each cart after an elastic collision

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2) Calculate the KE after the collision

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8) Which of the following graphs shows an elastic collision?

​Objects traveling in circular motion have constant speed and constantly CHANGING velocity – changing in direction but not magnitude

​

​v=d/t

​the 'd' in this case is

​

​the 't' in this case is

​Centripetal Acceleration

​•Centripetal force is a NET FORCE

•Causes ACCELERATION

•In the SAME DIRECTION AS NET FORCE

​If you substitute in for centripetal acceleration you can create a new equation for centripetal force. This is not on your reference table!

Uniform Circular Motion

• Vector Fields, Gravitational and Electrical Forces

• Tangential and Angular Velocity

• Centripetal Force and Acceleration

Multiple Choice

Where should you go on a merry go round to go fastest?

• Into the middle!

• Out to the edge!

• Doesn't matter- rotational speed and linear speed are the same everywhere!

• Jump up to go fastest!

Multiple Choice

If radius increases force will....

• decrease because they have a direct relationship

• decrease because they have a inverse relationship

• increase because they have a direct relationship

• increase because they have a inverse relationship

Multiple Choice

Why do objects experience centripetal acceleration?

• Because they are speeding up as they move in a circle

• Because they are constantly changing direction and the net change is directed inward

• Because they are constantly changing both speed and direction

• Because when you have 100 people pedaling, you can speed up more easily.

Multiple Choice

A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the centripetal force (Fc) acting on the car at a particular moment?

Multiple Choice

Which of the following ranks the tensions in the strings from highest to lowest?

• A>C>D>B

• B>D>C>A

• B>C>A>D

• D>A>C>B

Multiple Choice

A tennis ball on a string is spun clockwise around a circle. After the string breaks, which path will the tennis ball follow?

• Path I

• Path II

• Path III

• Path IV

Multiple Choice

A body, B, is moving at constant speed in a horizontal circular path around point P. Which diagram shows the direction of the velocity (v) and the direction of the centripetal force (Fc) acting on the body?

• 1

• 2

• 3

• 4