Question

Guys plz answer fast
2 blocks of masses m1= m2 = m are connected by a string of negligible mass which passes over a frictionless pulley connected with plane . When angle of inclination is 30 degrees , mass m1 just begins to move up the inclined plane . What is the coefficient of friction between block m1 and inclined plane

Answer 1

Explanation:

Answer : g2

Since the inclined plane is smooth and m2>m1,block m1 will up the plane and block m2 will move vertically with a common acceleration a.If T is the tension in the string,the free-body diagrams of masses m1 and m2 are as shown in figure.

The equations of motion of the blocks are

T−m1gsinθ=m1a-------(1)

m2g−T=m2a--------(2)

Equations (1) and (2) give

a=(m2−m1sinθ)g(m1+m2)

=(2m−m×sin30∘)g(m+2m)

=g2

Hence the correct choice is g2