First slide

Connected bodies

Question

Two bodies of masses 3kg and 2kg are connected by a long string and the string is made to pass over a smooth fixed pulley. Initially the bodies are held at the same level and released from rest. The velocity of the 3kg body after one second is (g=10m/ s²)

Moderate

A

2m/s
B

1m/s
C

0.4m/s
D

4m/s

Solution

$F = ma, a = (\frac{m_{1} - m_{2}}{m_{1} + m_{2}}) g, v = u + at$

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