Static and kinetic friction
Grade 11 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
A 5 kg box slides across a level floor with μk = 0.3. With g = 9.8 m/s², what is the kinetic friction force, Ari?
A 6 kg box slides across a level floor with μk = 0.4. With g = 9.8 m/s², what is the kinetic friction force, Bo?
A 20 kg box slides across a level floor with μk = 0.15. With g = 9.8 m/s², what is the kinetic friction force, Esme?
“Free-body diagram (example data): a box pushed across the floor” In the free-body diagram, how big is the friction force, Jun?
- 12 N
- 58.8 N
- 0 N, since it is moving
Read this first
Free-body diagram (example data)
a block sliding to the left of mass 2 kg, with arrows from its center: weight 19.6 N down; normal force 19.6 N up; friction ? N ?.
In the free-body diagram, which way does friction point on the block, Luz?
- Straight up
- To the right
- To the left, with the motion
Which kind of friction holds a box still on a slightly tilted board, Milo?
- Kinetic friction
- Static friction
- No friction
Which usually takes a bigger push: getting a heavy box started, or keeping it sliding, Noah?
- Getting it started
- Keeping it sliding
- They take the same push
A block slides east across a table. Which way does friction act on it, Ren?
- Down into the table
- East, with the motion
- West
A box rests on a ramp without sliding. Which way does friction act on it, Tala?
- Down the ramp, the way it would go
- Up the ramp
- Straight up
A puck slides north across rough ice. Which way does friction act on it, Zee?
- East
- South
- North