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  4. A small block of mass 50 g, compressing a spring (of spring constant k=500 Nm -1 ) by 10 cm is released on a horizontal surface. The surface to the right of A is rough (μ=0.2). Find the following: <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/546fe6920ff6f6cb43a706afcd664e87-.png /> The velocity (v) of the block as a function of time (t), when it moves on to the rough surface.

Q. A small block of mass , compressing a spring (of spring constant ) by is released on a horizontal surface. The surface to the right of is rough . Find the following:

The velocity of the block as a function of time , when it moves on to the rough surface.

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Solution:

Using

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