UCM & Gravity

Which of the following FBD is correct for the car at point A?

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Which force(s) act(s) as the centripetal force at point B?

• Fn

• Fg

• Fc

• Fn - Fg

The derived equation for the minimum velocity at the top of the loop at point C is...

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When in a car without your seat belt on, you feel you are flung to the side of the car due to the _____ effect when in fact you are _____ and will not turn until ____ applies a _____ force on you.

• centripetal, sliding, the door, centrifugal

• inertial, sliding, centripetal, center

• centrifugal, going straight, the door, centripetal

• centripetal, going straight, the door, centrifugal

If the mass, velocity, and radius are all doubled, what would be the effect on the centripetal acceleration?

• 1/2 the size

• the same

• 2 x larger

• 4 x larger

In what direction is the car accelerating?

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Which force(s) act(s) as the centripetal force on the car?

• Fc

• Ff

• Fn

• Fn + Ff

Which of the following would not be accelerating?

• A planet in orbit

• A thrown ball in the air

• A car driving down a straight road

• Driving a constant speed through a corner.

The string breaks while the ball is at point 1. What path does the ball take?

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The 5 N ball travels at 4 m/s when at the top of a vertical circle made by a 1 m long string. Find the tension in the string.

• 3 N

• 8 N

• 16 N

• 80 N