13. Many modern rifles use bullets that have less mass and reach higher speeds than bullets of older rifles. This makes the rifle more accurate over longer distances. The momentum of an old bullet, fired from an old rifle, is 8,25 kg.m.s-1 north. 3 What is the momentum of a new bullet which has 3/4 the mass of the old bullet and is fired at 3/2 of the speed of the old rifle?
Answers
Answer:
Momentum is a physical quantity which is closely related to forces. Momentum is a property which applies to moving objects, in fact it is mass in motion. If something has mass and it is moving then it has momentum.
Momentum
The linear momentum of a particle (object) is a vector quantity equal to the product of the mass of the particle (object) and its velocity.
The momentum (symbol p⃗ ) of an object of mass m moving at velocity v is:
p⃗ =mv⃗
Momentum is directly proportional to both the mass and velocity of an object. A small car travelling at the same velocity as a big truck will have a smaller momentum than the truck. The smaller the mass, the smaller the momentum for a fixed velocity. If the mass is constant then the greater the velocity the greater the momentum. The momentum will always be in the same direction as the velocity because mass is a scalar not a vector.