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.
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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
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