1

JEE Main 2021 (Online) 22th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

A porter lifts a heavy suitcase of mass 80 kg and at the destination lowers it down by a distance of 80 cm with a constant velocity. Calculate the work done by the porter in lowering the suitcase.

(take g = 9.8 ms

(take g = 9.8 ms

^{$$-$$2})2

JEE Main 2021 (Online) 20th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

A body at rest is moved along a horizontal straight line by a machine delivering a constant power. The distance moved by the body in time 't' is proportional to :

3

JEE Main 2021 (Online) 18th March Morning Shift

MCQ (Single Correct Answer)

+4

-1

A constant power delivering machine has towed a box, which was initially at rest, along a horizontal straight line. The distance moved by the box in time 't' is proportional to :-

4

JEE Main 2021 (Online) 17th March Morning Shift

MCQ (Single Correct Answer)

+4

-1

A boy is rolling a 0.5 kg ball on the frictionless floor with the speed of 20 ms

^{-1}. The ball gets deflected by an obstacle on the way. After deflection it moves with 5% of its initial kinetic energy. What is the speed of the ball now?Questions Asked from Work Power & Energy (MCQ (Single Correct Answer))

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