NEET UG PHYSICS MCQ: WORK-ENERGY-POWER

1 Easy

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Analyzing +4 | -1

When a particle is moving in a vertical circle,

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Correct option: B

its radial and tangential acceleration both are varying

Option B (its radial and tangential acceleration both are varying) is correct because both the speed and direction of the particle change continuously in vertical circular 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}}

and the boy changes his speed by

x = \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

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

. The diameter of the are is