AP Physics FBD

Name the missing force....

• weight force
• normal force
• frictional force
• tension force

Tags

NGSS.HS-PS2-1

A force of 8 Newton’s is applied to a crate so that it moves at a constant velocity of 1.5 m/s. What is the magnitude of the frictional force?

• 1.5 N

• 8 N

• 12N

• 0 N

Tags

NGSS.HS-PS2-1

Is this object in equilibrium?

• Yes and it's moving right

• Yes and its at rest

• No, it's accelerating right

• No, it's at rest

Tags

NGSS.HS-PS2-1

What is the NET FORCE of this diagram?

• 17 N, right

• 17 N, left

• 23 N, right

• 12 N, up

Tags

NGSS.HS-PS2-1

A force vs. time graph is shown for an elevator moving between floors. Why is there no net force in the middle of this graph?

• There is. You can't trick me.

• The elevator is at rest

• The elevator is accelerating

• The elevator has a constant speed

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?

• gravity keeps it moving up.

• Nothing. The ball simply has inertia.

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

Match description with free-body diagram.

• A book is at rest on a tabletop.
• A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling. Diagram the forces acting on the combination of gymnast and bar.
• An egg is free-falling from a nest in a tree. Neglect air resistance.
• A flying squirrel is gliding (no wing flaps) from a tree to the ground at constant velocity. Consider air resistance.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

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

• 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 at rest?

• 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