Question

109. A block is pushed up a rough inclined plane
of 45°. If the time of descent is twice the time
of ascent, the coefficient of friction is
1) 0.6 2) 0.4 3) 0.5 4) 0.25​

Answer 1

Explanation:

time of ascent is eq. to descent time

Answer 2

Answer:

0.6 {1}

Explanation:

formula is  here n is how many times grater than

μ= tan θ [n²-1/(n²+1)]

μ= tan 45 [ 4-1/ (4+1)]

μ= 1[ 3/5 ]

μ= 0.6