A 300-kg bear grasping a vertical tree slides down at constant velocity. The friction force between the tree and the bear is
A)30 N.
B)300 N.
C)3000 N.
D)more than 3000 N.

Question

Quizplus · Accepted Answer

Since the bear is sliding down at a constant velocity, the friction force must equal the gravitational force acting on the bear. The gravitational force is calculated as mass (300 kg) times the acceleration due to gravity (approximately 10 m/s²), which equals 3000 N.

A 300-Kg Bear Grasping a Vertical Tree Slides Down at Constant