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svlad2 [7]
2 years ago
14

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.
Physics
1 answer:
Nady [450]2 years ago
3 0

3000 N of friction exists between the bear and the tree.

The bear goes down at a constant speed, thus there is no acceleration. The forces add up to zero. As a result, upward friction and downward weight result in zero  

i.e.,

F-mg=0

F = mg

F = (300 kg)/10 m/s^{2} (gravitational acceleration)

3000 N frictional force equals F.

How does friction force work?

  • Friction is the force that prevents two solid objects from rolling or sliding over one another. Even though frictional forces, such as the traction required to walk without slipping, may be advantageous, they can also be a significant hindrance to motion.

Between solid surfaces, there are three basic types of friction:

  • Rolling
  • Sliding.
  • Static.                                                                                                                   They are graded from strongest to weakest. Fluid friction happens when liquids or gasses are mixed together.

To learn more about Friction force, visit:

brainly.com/question/13707283

#SPJ4

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So, the time period of oscillation measured by the observer is 5.79 seconds.

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