Question

If the angle of friction between the two surfaces 37° if cos 37 equal to 4 by 5 coefficient of friction between the two surfaces is P by 4 then p is

Answer 1

Answer:

mu = tan thita= tan37 = sin37/ cos37

p/4= sin 37/cos 37

and sin 37= √ 1-cos ^2(37)= √ 1- (4/5)^2

= √ 1-16/25= √9/25= 3/5

so p/4 = (3/5)/(4/5)= 3/4

so p= 3