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

PhysicsW.E.P.Work kinetic energy theoremMedium2 minQB

PhysicsMediumsingle choice

A block of mass 10kg is attached to a relaxed spring. Other end is attached to ceiling and block is released keeping the spring in vertical position. The spring is such that it has elongation of 10 cm under a force of 100 N . The maximum velocity of block in subsequent motion is :-

Options:

Answer:

Solution:

Block will have max velocity at equilibrium

$k \times \frac{1}{10} = 100 k = 1000 N / m$

Apply W. E. theorem

$W_{g} + W_{S} = \frac{1}{2} mv^{2} 100 \times \frac{1}{10} - \frac{100}{2} \times \frac{1}{10} = \frac{1}{2} 10 v^{2} = 5 v^{2} v = 1 m / s$

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Work kinetic energy theorem

⏱ 2mℹ️ Source: QB

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