Friction and Inclined Plane Review

A cart rolls down an inclined plane with constant speed as shown in the diagram. Which arrow represents the direction of the frictional force?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

The diagram represents a car resting on a hill. Which vector best represents the weight of the car?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A book weighing 20 N slides at a constant velocity down a ramp inclined at 30 degrees to the horizontal as shown in the diagram.

What is the force of friction between the book and the ramp?

• 10 N up the ramp

• 17 N up the ramp

• 10 N down the ramp

• 17 N down the ramp

Tags

NGSS.HS-PS2-1

• The block's mass will decrease

• The block's weight will increase

• The block's component of weight parallel to the ramp will decrease

• The block's component of weight parallel to the ramp will increase

Tags

NGSS.HS-PS2-1

A 10 kg block slides at constant speed down a plane inclined at 20^o to the horizontal, as shown. Determine the weight of the block.

Tags

NGSS.HS-PS2-1

A box decelerates as it moves to the right along a horizontal surface, as shown in the diagram. Which vector best represents the force of friction on the box?

• Down

• Up

• Right

• Left

Tags

NGSS.HS-PS2-1

A force of 25 N east and a force of 25N west act concurrently on a 5 kg cart. What is the acceleration of the cart?

• 1.0 m/s² west

• 0.2 m/s² east

• 5.0 m/s² east

• 0 m/s²

Tags

NGSS.HS-PS2-1

What are the magnitudes of the horizontal and vertical components of a 24 N force acting 35^o above the horizontal?

• F_H= 3.5 N and F_v= 4.9 N

• F_H= 4.9 N and F_v= 3.9 N

• F_H= 14 N and F_v= 20 N

• F_H= 20 N and F_v= 14 N

Tags

NGSS.HS-PS2-1

Sand is often placed on an icy road because the sand

• decreases the coefficient of friction between the tires of the car and the road

• increases the coefficient of friction between the tires of a car and the road

• decreases the gravitational force on a car

• increases the normal force of a car on the road

A 0.50 kg puck sliding on a horizontal shuffleboard court is slowed to rest by a frictional force of 1.2 N. What is the coefficient of kinetic friction between the puck and the surface of the shuffleboard court?

• 0.24

• 0.42

• 0.60

• 4.1

Tags

NGSS.HS-PS2-1