Consider two objects of masses 5 kg and 20 kg which are initially at rest. A force 100 N is applied on the two objects for 5 second. (a) What is the momentum gained by each object after 5 s? (b) What is the speed gained by each object after 5 s?

Explanation

Final momentum on each object `Delta P = D Delta t =100 xx 5 = 500 kg ms^(-1)`
Final speed on the object of mass `5 kg = 500//5 =100 ms^(-1)`
Final speed on the object of mass `20 kg = 500//20 =25 m s^(-1)`