A box with a a weight of 215 N rests on on ramp. There is a frictional force of 27 N exerted on the box directed up the ramp. If the ramp is inclined at 30°, what force must be applied at an angle of 40° to the ramp to maintain equilibrium?

1 Answer
Jane
Feb 26, 2018

Please see below

Explanation:

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Note here we equated #mu mg cos 30# to the given amount of frictional force,as it stated that #215 N# can't get balanced by frictional force,so #27 N# must be the maximum value of frictional force.

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