Laws of Motion - Result Question 19

19. Two bodies of mass 4kg and 6kg are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is:

[2020]

(a) g/2

(b) g/5

(c) g/10

(d) g

Show Answer

Answer:

Correct Answer: 19. (b)

Solution:

  1. (b) Given: Mass M1=4kg and M2=6kg.

Acceleration of the system,

a=(m1−m2)g(m1+m2) where m1>m2

∴a=(6−4)g6+4=g5

Here no option is given according to acceleration of COM of the system.

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