A block of mass 2 kg slides down an incline plane of inclination 30°. The coefficient of friction between block and plane is 0.5. The contact force between block and plank is :

A block of mass 2 kg slides down an incline plane of inclination 30°.

1.	A block of mass 2 kg slides down an incline plane of inclination 30°. The coefficient of friction between block and plane is 0.5. The contact force between block and plank is :
Answer» 20 N `10sqrt3N` `5sqrt7N` `5sqrt15N` ANSWER :D