JEE Advanced Model Paper 6 with solutions for online practice

A small block of mass 1kg is released from rest at the top of a rough track. The track is acircular arc of radius 40m. The block slides along the track without toppling and a frictionalforce acts on it in the direction opposite to the instantaneous velocity. The work done inovercoming the friction up to the point Q, as shown in the figure below (g = 10 m/s2) is 150J