Physics

1A force of 10 N acts for 0.2 s. The impulse is ___ N s.

2A gun of mass 4 kg fires a bullet of mass 0.02 kg at 300 m/s. Find the recoil velocity of the gun.

3A larger mass has greater inertia.

4A gun of mass 2 kg fires a bullet of mass 0.05 kg at 300 m/s. Find the recoil velocity of the gun.

5A force of 100 N acts for 0.5 s. The impulse is ___ N s.

6A 2 kg trolley moving at 10 m/s collides with a stationary 1 kg trolley and they move off together. Find their common velocity.

7Newton's second law states that the rate of change of momentum is

8Seat belts reduce injury in a crash because they

9Inertia is

10A force of 50 N acts for 0.1 s. The impulse is ___ N s.