Q: A ball of 0·1 kg mass is dropped on a hard floor from a height of 0·45 m and rises to a height of 0·20 m. If it was in touch with the floor for 0·1 s, the net force it applied on the floor while bouncing is : (take the gravitational acceleration g = 10 m s⁻²)
(a)1·0 N
(b)6·0 N
(c)3·0 N
(d)5·0 N
Answer pending verification