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Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.Calculation of workMedium2 minQB

PhysicsMediumsingle choice

A body of 4 kg mass placed on a smooth horizontal surface experiences a force varying with displacement of block as shown in figure. Find the speed of the body when force ceases to act on it :-

Options:

Answer:

Solution:

Work = area under the F-x graph: triangle (0-3) $\frac{1}{2} \times 3 \times 30 = 45$ , trapezium (3-4) $25$ , rectangle (4-6) $40$ , triangle (6-8) $20$ . Total 130 J.

$\frac{1}{2} (4) v^{2} = 130 \Rightarrow v = 65 m/s$

Ans. (A)

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Calculation of work

⏱ 2mℹ️ Source: QB

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