A block of mass 4.0 kg starts from rest and slides down a surface which corresponds to a
quarter of a circle of 2.0 m radius. (i) If the curved surface is smooth, find the speed at the
bottom. (ii) If the speed at the bottom is 2.0 ms-1
, calculate the energy dissipated due to
friction in the descent. (iii) After the block reaches the horizontal with a speed of 2.0 ms-1
it
slides to a stop in a distance of 1.5 m. Calculate the frictional force acting on the
horizontal surface. Take
10.0 ms .
2 g
(10)
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A block of mass 4.0 kg starts from rest and slides down a surface which corresponds to a quarter of a circle of 2.0 m radius. (i) If the curved surface
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