In the figure below, all surfaces are assumed to be smooth and the force F=100N. If the acceleration of block B of mass 20kg is 'a' and tension in the string connecting block A of mass 20kg is T, then just after force F is applied,
A
T=0 and a=5m/s2
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B
T=100N and a=0
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C
T=200N and a=5m/s2
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D
T=100N and a=5m/s2
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Solution
The correct option is AT=0 and a=5m/s2 As no force acts on A, T=0
Acceleration of B a=FmB=10020=5m/s2