Work, Energy and Power

Related Questions

• An engine pumps up 100 kg of water through a height of 10 m in 5 s. Given that the efficiency of the engine is 60% . If $g = 10m{s^{ - 2}}$, the power of the engine is

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• An object of mass 3m splits into three equal fragments. Two fragments have velocities $v\hat j$ and $v\hat i$. The velocity of the third fragment is

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• The block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant K and compresses it by length L. The maximum momentum of the block after collision is

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• Two putty balls of equal mass moving with equal velocity in mutually perpendicular directions, stick together after collision. If the balls were initially moving with a velocity of $45\sqrt 2 \,m{s^{ - 1}}$ each, the velocity of their combined mass after collision is

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• A force acts on a 30 gm particle in such a way that the position of the particle as a function of time is given by $x = 3t - 4{t^2} + {t^3}$, where x is in metres and t is in seconds. The work done during the first 4 seconds is

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