Kinematics

 Kinematics is the study of objects in motion, their velocity, acceleration, and momentum.

Example: Train moving, moving water in a river.

What is momentum?

Momentum is the product of mass and velocity. For example, when a heavy truck is moving it, requires high momentum and to move a small tennis ball requires less momentum.

We can connect a force to momentum p= mv differentiate this on both sides with respect to t.

^dp/_dt = m ^dv/_dt but a = ^dv/_dt p= ma =f , so here we can clearly come to the conclusion that the momentum applied to the body is directly proportional to the force applied on it.

The heavier the mass, the larger the momentum is and the lesser the mass, the lower the momentum is.

Conservation of Momentum

In a closed region, the total momentum is said to be conserved as told by newton's third law of motion.

For example: when two elastic balls are colliding with each other than their total momentum is conserved

that is m₁v₁ = -m₂v₂