please help 14. An object traveling at 4.0 meters per second has a momentum of 16 kilogram-meters persecond. What is the mass of the object?(1) 64 kg(2) 20 kg(3) 12 kg(4) 4.0 kg15. Two carts resting on a frictionless surface are forced apart by a spring. One cart has amass of 2 kilograms and moves to the left at a speed of 3 meters per second. If the secondcart has a mass of 3 kilograms, it will move to the right at a speed of(1) 1 m/s(2) 2 m/s(3)3 m/s(4) 6 m/s16. A 20.-kilogram mass moving at a speed of 3.0 meters per second is stopped by a constantforce of 15 newtons. How many seconds must the force act on the mass to stop it?(1) 0.20 s(2) 1.3 s(3) 5.0 s(4) 4.0 s17. A 5.0-newton force imparts an impulse of 15 newton-seconds to an object. The forceacted on the object for a period of(1) 0.33 s(2) 20. s(3) 3.0 s(4) 75 s18. If a net force of 10. newtons acts on a 6.0-kilogram mass for 8.0 seconds, the total changeof momentum of the mass is(1) 48kg•m/s(2) 60. kg•m/s(3) 80. kg•m/s(4) 480 kg•m/s19. In the diagram below, a 0.4-kilogram steel sphere and a 0.1-kilogram wooden sphere arelocated 2.0 meters above the ground. Both spheres are allowed to fall from rest.STEELWOOD1.0 m2.0 mGROUNDWhich statement best describes the spheres after they have fallen 1.0 meter? [Neglect airresistance.](1) Both spheres have the same speed and momentum.(2) Both spheres have the same speed and the steel sphere has more momentum than thewooden sphere.(3) The steel sphere has greater speed and has less momentum than the wooden sphere.(4) The steel sphere has greater speed than the wooden sphere and both spheres have thesame momentum.

Velocity v=4m/s momentum p = 16kg.m/s Momentum is given by P=mv Therefore, m = pv…

14. An object traveling at 4.0 meters per second has a momentum of 16 kilogram-meters per second. What is the mass of the object? (1) 64 kg (2) 20 kg (3) 12 kg (4) 4.0 kg 15. Two carts resting on a frictionless surface are forced apart by a spring. One cart has a mass of 2 kilograms and moves to the left at a speed of 3 meters per second. If the second cart has a mass of 3 kilograms, it will move to the right at a speed of (1) 1 m/s (2) 2 m/s (3) 3 m/s (4) 6 m/s 16. A 20.-kilogram mass moving at a speed of 3.0 meters per second is stopped by a constant force of 15 newtons. How many seconds must the force act on the mass to stop it? (1) 0.20 s (2) 1.3 s (3) 5.0 s (4) 4.0 s