+1 vote
in Machine Kinematics by (38.0k points)
A body of mass 1 kg is kept on a rough surface having coefficient of friction = 0.25 being pulled by a force of 2N, after how long will the body come to rest again?

(a) 2s

(b) 2.5s

(c) 0s

(d) 4s

This question was posed to me in homework.

Enquiry is from Limiting Friction in division Friction of Machine Kinematics

1 Answer

0 votes
by (106k points)
Correct option is (c) 0s

The explanation is: Since the applied force of 2N has a value less than the limiting friction 0.25×9.81

The acting friction will be static friction and the body will stay at rest and will not undergo any motion until the applied force exceeds the value of limiting friction.

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