Question

in the figure shown upper block is given a velocity of 6 metre per second with respect to ground and lower block is 3 metre per second with respect to ground when relative motion between them is stopped work done by friction on upper block is -5n find n

Answer 1

v = 3 m/s

u = 6 m/s

change velocity = (6-3) m/s

                           = 3 m/s

So, n = {(3)/(-5)} m/s²

         = -0.6 m/s²