Q221
Open questionWhich of the following is not an example of potential energy?
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Physics GK · all questionsWork, Energy and Power
Work, Energy and Power
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Q222
Open questionWhich of the following notable activities, potential energy has been converted into kinetic energy.
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Q223
Open questionIf someone travels 15 km distance with a fixed force of 500N, then calculate the work done.
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Q224
Open questionA worker takes 15kg object and put the object 1 meter above on his head from the surface of earth. Then work done by the worker is- (g = 10 ms-2).
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Q225
Open questionA person picks up 25 kg of weight from the ground and puts it 2.5 meters above from the ground on his head if g = 10 m/s2 then work done by the person is-
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Q226
Open questionWhich of the following energy varies with the height of an object?
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Q227
Open questionConsider the following statement and conclusions which can be drawn from it. Choose the correct conclusion.
Statement: In starting a loaded cart, one has to push harder than to keep it moving.
Statement: In starting a loaded cart, one has to push harder than to keep it moving.
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Q228
Open questionIf the displacement of an object is zero. Then work done by the applied force is-
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Q229
Open questionA person picks up 20kg of goods at 2m above the ground and keeps it on his head, work done by the person is?
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Q230
Open questionWhich of these objects does not have kinetic energy?
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Q231
Open questionWhat is the product of mass and velocity called?
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Q232
Open questionIf the value of work is positive then the kinetic energy of the body-
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Q233
Open questionAn object of mass 12kg is placed at a certain height from the ground. If the potential energy of the object is 600J, find the height from the ground of the object?
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Q234
Open questionIf a boy covers a distance of 20 meters with 600 Newton force in 4 minutes, then the amount of power consumed by the boy is?
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Q235
Open questionIt is difficult to walk on the ice than on the road because
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Q236
Open questionWhen a body is made to slide over a rough horizontal surface, the work done by the frictional force is
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Q237
Open questionDuring the free fall of an object, which of following energy increases at one point in its path?
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Q238
Open questionWhen a freely falling object eventually stops on reaching the ground,
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Q239
Open questionA ball weighing 0.1 kilogram is dropped from a stationary position when it falls from a distance of 2 meters, then what will be the work done by the force of gravity.
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Q240
Open questionWhat type of energy does a stretched rubber band have?
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