PencilGo

Grade 11 · Science · Physics

11th grade Static and kinetic friction worksheet

6 printable versionsChallenge Me10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

When it’s done, scan the sheet with your phone and PencilGo marks it and picks the next one. Create a free account

Version
Print

Static and kinetic friction

Grade 11 Science Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

  1. Esme pulls a 4 kg box at a constant velocity across a floor with a horizontal pull of 11.76 N. With g = 9.8 m/s², what is μk?

  3. In the friction graph, what is μk for the block on the board, Jun?

    • 3
    • 12
    • 0.3
    • 3.33

  4. Using the friction graph, what friction would a 50 N normal force give, Kira?

    Use the picture in question 2.

    • 50 N
    • 15 N
    • 167 N
    • 12 N

  5. What does the straight line in the friction graph show, Luz?

    Use the picture in question 2.

    • Friction doesn't depend on the normal force
    • Friction falls as the normal force grows
    • Friction is proportional to the normal force
    • Friction equals the normal force

  6. Milo says a box at rest on a level floor always feels its full μs N of static friction. Agree or disagree?

    • Agree: static friction sits at its limit
    • Agree: μ is the normal force ÷ friction
    • Agree: and kinetic friction is even bigger
    • Disagree: it only matches the push

  7. Noah says it takes more force to keep a box sliding than to get it started. Agree or disagree?

    • Agree: μ is N ÷ f
    • Disagree: static friction is usually larger
    • Agree: kinetic friction is usually larger
    • Agree: friction at rest sits at its limit

  8. Pia says μ = friction ÷ normal force, so 6 N of friction with a 20 N normal force means μ = 0.3. Agree or disagree?

    • Agree: 6 ÷ 20 = 0.3
    • Disagree: kinetic friction beats static
    • Disagree: static friction stays at its limit
    • Disagree: μ = 20 ÷ 6

  9. Which change makes a heavy box easiest to move across a floor, Ren?

    • Put it on a cart with wheels
    • Stack another box on it
    • Put rubber pads under it
    • Press down on it

  10. Why does spreading sand on an icy path help, Tala?

    • It melts the ice at once
    • It raises the friction coefficient
    • It lowers the normal force on the path
    • It makes the ice heavier

  11. Why do sleds use thin steel runners on snow and ice, Zee?

    • Runners make the sled heavier
    • Steel on ice has a very small μ
    • Steel has a very large μ
    • Runners remove the normal force
PencilGopencilgo.com

11th grade Static and kinetic friction worksheet – printable
Print: 123456

About this worksheet

Static and kinetic friction. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can find kinetic friction, f = μk N, with N = mg on level ground, and use it in F = ma for a sliding box.
  • I can explain static friction. It matches the push up to μs N, then the box slides. It is usually larger than kinetic friction.
  • I can find μ from a constant-velocity pull, or from the slope of friction plotted against normal force.
  • I can predict how pressing down, pulling up at an angle, loads, wheels, sand and steel runners change friction. Friction points against the sliding.

Standard: HS-PS2-1

Words to know

static friction: Friction holding surfaces that aren't sliding; up to μs N

kinetic friction: Friction between sliding surfaces: μk N

coefficient of friction μ: A number for how grippy two surfaces are; no unit

normal force: The surface's push straight out from itself

constant velocity: No acceleration, so the forces balance

Common mistakes

Your child used the mass as the normal force. On level ground the normal force is the weight, m × 9.8, in newtons.

Your child left friction out. Subtract the friction force from the push before using F = ma.

Your child used the most static friction can give. Static friction only matches the push, up to its limit μs N.

Questions parents ask

What is the most common mistake with static and kinetic friction?

Your child used the mass as the normal force. On level ground the normal force is the weight, m × 9.8, in newtons.

Are these 11th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

More physics

See all Physics

Every sheet you scan goes into your child’s record: dated, marked and ready for the year-end portfolio. Homeschool records

Ready for easier practice?

Print a sheet, scan it when it’s done, and PencilGo picks the next one.

Create a free account