JEE Main 2022 (Online) 26th June Evening Shift | Work Power & Energy Question 52 | Physics

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

-1

Arrange the four graphs in descending order of total work done; where W₁, W₂, W₃ and W₄ are the work done corresponding to figure a, b, c and d respectively.

JEE Main 2022 (Online) 26th June Evening Shift Physics - Work Power & Energy Question 54 English 1

JEE Main 2022 (Online) 26th June Evening Shift Physics - Work Power & Energy Question 54 English 3

JEE Main 2022 (Online) 26th June Evening Shift Physics - Work Power & Energy Question 54 English 4

W₃ > W₂ > W₁ > W₄

W₃ > W₂ > W₄ > W₁

W₂ > W₃ > W₄ > W₁

W₂ > W₃ > W₁ > W₄

JEE Main 2022 (Online) 24th June Morning Shift

MCQ (Single Correct Answer)

-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 :

50.0 J

12.5 J

25.0 J

0 J

JEE Main 2021 (Online) 1st September Evening Shift

MCQ (Single Correct Answer)

-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 :

$$-$$0.68 mgh

mgh

1.64 mgh

0.64 mgh

JEE Main 2021 (Online) 31st August Evening Shift

MCQ (Single Correct Answer)

-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 :-

$${{1 \over 3}}$$

$${{2 \over 3}}$$

$${{1 \over 8}}$$

$${{1 \over 4}}$$

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