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Friction — Homework
Decide first whether the object is sliding yet -- that decides whether mu_s or mu_k belongs in your answer.
- 1.A 15 kg box has mu_k = 0.25 with the floor. Find the kinetic friction force once it is sliding.
- 2.Using the same box, if it is pulled with a 50 N applied force while sliding, find its acceleration.
- 3.A surface has mu_s = 0.45. Find the maximum static friction on a 200 N normal force.
- 4.Explain why pushing a heavy dresser is hardest right at the very start of the push.
- 5.Describe a real-world example of friction being deliberately increased or decreased by engineers (tire tread, ice skates, ball bearings) and explain which type of friction it affects.
🌲 Homeschool of the FutureEleventh Grade · Science · week 13 homework