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PhysicsW.E.P.MiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A block of mass $m$ is kept on a rough horizontal surface and is attached with a massless spring of force constant $k$ . The minimum constant force applied on the other end of the spring to lift the block is

Options:

Answer:

Solution:

As $W_{ext} = Δ E = \frac{1}{2} {Kx}^{2}; F.x = \frac{1}{2} {Kx}^{2}$ or $F = \frac{K x}{2}$

For lifting $K x = M g$ or $F = \frac{Mg}{2}$

Subject:PhysicsTopic:W.E.P.Subtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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