JEE Previous Year Question

A block is moving on an inclined plane making an angle 45° with the horizontal and the coefficient of friction is µ. The force required to just push it up the inclined plane is 3 times the force required to just prevent it from sliding down. If we define k = 10 µ, then value of k is

Topic: JEE PYQ

Answer: 5. Full step-by-step solution below.

Correct answer: 5

Solution

(5)

=

=
=
1 + μ = 3 – 3μ
4μ = 2
μ =
k = 10μ
k = 5 Ans.

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