Questions
A particle can move along x-axis initially. The particle is at rest at the origin and force is applied on it. If mass of the particle is 1 kg, the work done by the force in 2 second is
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Correct option is A
Acceleration of the particle, a=2t1m/s2=2t m/s2∴dvdt=2t⇒∫0vdv=2∫0ttdt⇒v=t2m/sAt t=2sec, v=m/s=4m/s∴By work−energy theorm, W=Kf−Ki=12×1×42−0=8JSimilar Questions
The curved portions are smooth and horizontal surface is rough. The block is released from P. At what distance from A, it will stop (if = 0.8)?
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