A bear that weighs 4000 newtons grasps a vertical tree and slides down at a constant velocity. What is the friction force that acts on the bear

Question

Bear weighs:4000 newtons

tree: slides down at a constant velocity

 

Answer 1

Since the bear slides down at a constant velocity, its motion is unaccelerated, so the upward resistive force of friction F_f must balance the downward force of gravity.

 

F_f = mg = 4000 N