A block of mass 5 kg slides down on an inclined plane of inclination 30° from a height of 10 m form ground. The coefficient of friction between the block and the inclined plane is 0.5. Find the work done by friction on the block.

Q: A block of mass 5 kg slides down on an inclined plane of inclination 30° from a height of 10 m form ground. The coefficient of friction between the block and  inclined plane is 0.5. Find the work done by friction on the block.

Numerical

(a) 250√3 J

(b)-250√3 J

(c) 500 J

(d)-500 J

Ans: (b)