AP Physics Mechanics of Rotation

Is it possible to be moving to the left like this and have friction in that direction?

• Yes. You have negative acceleration.

• Yes. You have a constant velocity

• No. The force vectors must always point in the direction of motion

• No. You have negative acceleration.

Tags

NGSS.HS-PS2-1

Here are 3 FBD diagrams for an elevator. Consider them to be A, B, C. Which one shows an elevator moving upward but braking?

• A

• B

• C

• none of these

Tags

NGSS.HS-PS2-1

Here are 3 FBD diagrams for an elevator. Consider them to be A, B, C. Which one shows an elevator moving at a constant rate of 2.5 m/s?

• A

• B

• C

• none of these

Tags

NGSS.HS-PS2-1

The box on the incline is at rest due to friction. Which of these calculations would allow you to get the frictional force?

• mg cos theta

• mg sin theta

• normal force

• mg

Tags

NGSS.HS-PS2-1

Forces cause acceleration.

• True. Every acceleration requires a force.

• True. Every force causes acceleration.

• False. Acceleration can occur when there is no net force

• False. Only net forces cause acceleration.

Tags

NGSS.HS-PS2-1

A tennis ball is thrown upward by a student so that it leaves their hand at 5.29 m/s. After it leaves their hand, what keeps it moving up?

• The initial force of their hand overcame gravity

• Nothing. The ball simply has inertia.

• gravity keeps it moving up.

• It is not actually moving up. That is a construct.

Tags

NGSS.HS-PS2-1

The force found perpendicular to a surface is

• Normal

• Friction

• Static

• Weight

What's happening in this FBD?

• Forward acceleration

• Braking

• at rest

• constant velocity

Tags

NGSS.HS-PS2-1

The force that opposes motion is

• Normal

• Friction

• Weight

• Applied

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