1

JEE Main 2022 (Online) 24th June Morning Shift

MCQ (Single Correct Answer)

+4

-1

A particle experiences a variable force $$\overrightarrow F = \left( {4x\widehat i + 3{y^2}\widehat j} \right)$$ in a horizontal x-y plane. Assume distance in meters and force is newton. If the particle moves from point (1, 2) to point (2, 3) in the x-y plane, then Kinetic Energy changes by :

2

JEE Main 2021 (Online) 1st September Evening Shift

MCQ (Single Correct Answer)

+4

-1

A body of mass 'm' dropped from a height 'h' reaches the ground with a speed of 0.8$$\sqrt {gh} $$. The value of workdone by the air-friction is :

3

JEE Main 2021 (Online) 31st August Evening Shift

MCQ (Single Correct Answer)

+4

-1

A block moving horizontally on a smooth surface with a speed of 40 m/s splits into two parts with masses in the ratio of 1 : 2. If the smaller part moves at 60 m/s in the same direction, then the fractional change in kinetic energy is :-

4

JEE Main 2021 (Online) 27th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

Given below is the plot of a potential energy function U(x) for a system, in which a particle is in one dimensional motion, while a conservative force F(x) acts on it. Suppose that E

[ where K.E. = kinetic energy ]

_{mech}= 8 J, the incorrect statement for this system is :[ where K.E. = kinetic energy ]

Questions Asked from Work Power & Energy (MCQ (Single Correct Answer))

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