Work, Energy and Power

Related Questions

• A force $\vec F = 5\hat i + 6\hat j - 4\hat k$ acting on a body, produces a displacement $\vec s = 6\vec i + 5\vec k.$ Work done by the force is

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• A body of mass 2kg makes an elastic collision with another body at rest and continues to move in the original direction with one fourth of its original speed. The mass of the second body which collides with the first body is

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• A particle moves from position ${\vec r_1} = \,3\hat i + 2\hat j - 6\hat k$ to position ${\vec r_2} = 14\hat i + 13\hat j + 9\hat k$ under the action of force $4\hat i + \hat j + 3\hat k\,N.$ The work done will be

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• A ball of mass 2kg and another of mass 4kg are dropped together from a 60 feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of

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• 100 g of a iron ball having velocity 10 m/s collides with a wall at an angle ${30^o}$ and rebounds with the same angle. If the period of contact between the ball and wall is 0.1 second, then the force experienced by the ball is

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