Forces Friction

Friction is a force that acts in a(n) ___________ direction relative to a moving object.

• similar

• opposite

• parallel

• perpendicular

What is friction?

• It is a resistance force

• Friction  does not exist

• It is an imaginary force

• It is red

How do you lower the friction force?

• By a smooth surface

• By a rough surface

• By not pushing hard

• By pushing down

You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.

• 20N 

• 40N 

• 10N 

• 70N

Tags

NGSS.MS-PS2-1

In the diagram below, a girl sits on a sled and slides down a hill of snow. The arrow that represents the force of friction opposing the motion of the sled down the hill is (a)   .

• Arrow A

• Arrow B

• Arrow C

• Arrow D

Tags

NGSS.MS-PS2-2

You push on a box and are unable to move it. What force opposes your push?

• static friction

• rolling friction

• sliding friction

• air resistance

If the pushing force is removed and the block slows down, the force of friction acts in which direction?

• up

• down

• to the right

• to the left

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In the diagram below, a girl sits on a sled and slides down a hill of snow. Which arrow represents the force of friction opposing the motion of the sled down the hill?

• Arrow A

• Arrow B

• Arrow C

• Arrow D

Tags

NGSS.MS-PS2-2

What type of fluid friction acts on an object moving through the air?

• Friction 

• Normal Force 

• Gravity 

• Air resistance 

Friction is a force that acts in an ___________ direction of movement.

• similar

• opposite

• parallel

• west