Question

Two block of masses m1 = 5/√3kg and m2 = 5kg are released from rest on a frictionless inclined plane as shown in fig then:
a) The block A moves down the plane.
b) The block B moves down the plane.
c) Both blocks remain at rest.
d) Both blocks move down the plane.​

Answer 1

Answer:

(c) Both blocks remain at rest.

Explanation:

F1 & F2 are downward forces along the planes

F1 = m1 sin 60°

F1 = 5/√3 × √3/2 = 5/2 N

F2 = m2 sin 30°

F2 = 5 × 1/2 = 5/2 N

therefore F1 = F2

hence cancel each other