If the pulley is pulled down with a force of 120N as shown in figure. The acceleration of 8kg block would be:
(All pulleys are light and frictionless, string is massless and inextensible)
(Take g=10m/s2)
A
10m/s2
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B
5m/s2
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C
0
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D
4m/s2
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Solution
The correct option is B5m/s2 FBD of pulley P1:
2T=120 (massless pulley)
⇒T=60N
Let a be the acceleration of the block.
Since a single string is connected throughout. So, F.B.D of 8kg block and pulley P2 will be