NEET UG PHYSICS MCQ: WORK-ENERGY-POWER

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Work done by a frictional force is

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Correct option: D

All of the above

Option D (All of the above) is correct because frictional force can do positive, negative, or zero work depending on the frame of reference and the direction of motion.

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{A}

ball is dropped on the ground from a height of

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2\mathrm{\;m}{\mathrm{s}^{ - 1}}

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is A force

\mathrm{\vec F} = - K\left( {y\hat i + x\hat j} \right)

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\mathrm{\vec F}

on the particle is A motor is used to deliver water at a certain rate from a given pipe. To obtain 3 times water from same pipe in same time, by what factor should power of the motor be increased. A body projected vertically from the earth reaches a height equal to earth’s radius before returning to the earth. The power exerted by the gravitational force is greatest The speed limit of a car over a roadways bridge in the form of a vertical arc is

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