As shown in figure, S is a point (always at a fixed distance from centre of...

 

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As shown in figure, S is a point (always at a fixed distance from centre of disc) on a uniform disc rolling with uniform angular velocity on a fixed rough horizontal surface. The forces acting on the disc are its weight and contact forces exerted by horizontal surface. Which graph best represents the magnitude of the acceleration of point S as a function of time? As shown in figure, S is a point (always at a fixed distance from centre of disc) on a uniform disc rolling with uniform angular velocity on a fixed rough horizontal surface. The forces acting on the disc are its weight and contact forces exerted by horizontal surface. Which graph best represents the magnitude of the acceleration of point S as a function of time?

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