a 0.5kgball falls into a heap of sand from a height of 10m above the sand. it comes to rest 2.5m beneath the surface of sand. what is the average force exerted by sand on the ball.

Answer 1

energy gained from gravity= mg*(12.5)
the sand has to provide the work..

force*distance=mg*12.5
forceaverage= mass*g*12.5/2.5 N