Question

Box on carpeted floor

A 30.0 kg box is being pulled across a carpeted floor by a horizontal force of 230 N , against a friction force of 210 N . What is the acceleration of the box?

Which of the following forces are relevant or irrelevant?
Static friction: Fs
Kinetic friction: Fk
Pulling force: Fp
Weight:W
Normal force: N

Part B
Choose the best coordinate system for this problem:
A) Align the positive y direction with the normal force and the positive x direction with the force of kinetic friction.
B) Align the positive y direction with the normal force and the positive x direction with the pulling force
C) Align the positive y direction with the weight and the positive x direction with the force of kinetic friction.
D) Align the positive y direction with the weight and the positive x direction with the pulling force.

Solutions

Expert Solution
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