Back to WORK-ENERGY-POWER

NEET UG PHYSICS MCQ: WORK-ENERGY-POWER

1 Medium

1 of 1

Analyzing +4 | -1

Statement-I: The workdone in pushing a block is more than the work done in pulling the block on a rough surface.
Statement-II: In the pushing condition normal reaction in more.

View answer and explanation

Correct option: A

Statement-I

\&

II are true.

Option A (Statement-I & II are true) is correct because pushing a block increases the normal reaction, leading to more friction and thus more work done compared to pulling.

More Questions from WORK-ENERGY-POWER

Practice All Chapter MCQs →

{A}

ball is dropped on the ground from a height of

2 {~m}

. If the coefficient of restitution is 0.6 , the height to which the ball will rebound is A running man has the same kinetic energy as that of a boy of half his mass. The man speed up by

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

and the boy changes his speed by

x = \mathrm{m}{\mathrm{s}^{ - 1}}

, so that the kinetic energies of the boy and the man are again equal. Then x in

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

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

(where K is a positive constant) acts on a particle moving in the x-y plane. Starting from the origin, the particle is taken along the positive x-axis to the point (a,0) and then parallel to the y-axis to the (a,a). The total work done by the force

\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