AP Physics 1 Unit 3 Circular Motion

Centripetal force is...

• the resultant force acting on a body moving at constant speed in a circle

• the outwards force acting on a body moving at constant speed in a circle

Which represents the acceleration of the ball?

• A
• B
• C
• D

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NGSS.HS-PS2-1

Which of the following depict the speed of the blowing ball?

• A
• B
• C
• D

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NGSS.MS-PS3-1

Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s².

• 2.4 m/s
• 3.6 m/s
• 3.9 m/s
• 4.2 m/s

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NGSS.HS-PS2-1

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.

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NGSS.HS-PS2-1

What is the force that causes centripetal acceleration when a car goes around a curve?

• Friction
• Gravity 
• Normal
• Tension

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NGSS.HS-PS2-1

A test car moves at a constant speed around a circular track.  If the car is 48.2 m from the track's center and has a centripetal acceleration of 8.05 m/s², what is the car's tangential speed?

• 19.7 m/s
• 5.99 m/s
• 0.17 m/s
• 388.01 m/s

How does the force of gravity between two objects change when the distance between them is 5 times larger?

• 5 times more

• 5 times less

• 25 times more

• 25 times less

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NGSS.HS-PS2-4

How does the gravitational force the Earth exerts on the sun compare to the gravitational force the sun exerts on the Earth?

• The gravitational force the sun exerts on the Earth is larger

• The gravitational force the Earth exerts on the sun is larger

• Their gravitational forces are equal

• There is not enough information

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NGSS.HS-PS2-4

At what distance from the sun is the gravitational force due to the sun on an object zero?

• Once you get farther away than Pluto.

• It is not possible, the sun's gravity will always affect you

• 50 light-years

• We do not know, since no man-made object has traveled that far

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NGSS.HS-PS2-4