Laws Of Motion Question 315

Question: Two blocks m1=5gm andm2=gm are hung vertically over a light frictionless pulley as shown here. What is the acceleration of the masses when they are left free? (Where g is acceleration due to gravity)

Options:

A) g/3

B) g/2

C) g

D) g/5

Show Answer

Answer:

Correct Answer: A

Solution:

[a] Let T be the tension in the string.

10gT=10a(i)

T5g=5a..(ii)

Adding (i) and (ii), 5g=15aa=g3m/s2



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