AP Physics Rotation

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.

Tags

NGSS.HS-PS2-1

At the instant shown in the diagram, the car's centripetal acceleration is directed-

• toward E

• toward N

• toward W

• clockwise

Tags

NGSS.HS-PS2-1

If the radius of the string is .3 meters long and the stopper makes 5 revolutions per second, what is the speed of the stopper? (Hint: C=2πr)

• 9.4 m/s

• 6.8 m/s

• 11.7 m/s

• 3.5 m/s

Tags

NGSS.MS-PS3-1

Calculate the mass of an object if it took 20 N of force to rotate it in a circle with a radius of 2 meters with a velocity of 4 m/s

• 4.1 kg

• 3.6 kg

• 2.5 kg

• 1.8 kg

Tags

NGSS.HS-PS2-1

A pilot experiences centripetal acceleration of 2g's while maneuvering a loop at a speed of 400 m/s.  What is the radius of the loop?

• 203 m

• 8163 m

• 80,003 m

• 23 m

Tags

NGSS.HS-PS2-1

The velocity is always _____ to the line of a circle. 

• outwards

• towards the center

• tangent

• faster

Tags

NGSS.HS-ESS1-4

What happens to an object's speed as the radius decreases?

• It increases.

• It decreases.

• It remains unchanged.

If a ball is swinging at the end of a rope and the rope is suddenly cut, assuming there is no gravity, what best describes the path it will take?

• It will fly in a straight line forward from where it was cut

• It will fly in a curved line away from the circle

• It will fly inward toward the circle

• 

Tags

NGSS.HS-PS2-2

A toy train moves in a circular track with a velocity of 2.2 m/s, the axis of rotation is 1.8 m. What is its centripetal acceleration?

• 1.22 m/s²

• 0.81 m/s²

• 2.69 m/s²

• 1.47 m/s²

What is the direction of the velocity at point B, if the ball is revolving clockwise?

• up

• right

• down

• left