Question

plzz explain me the basic of physics...!

Answer 1

Here we go :

1- Mass, weight and force : The weight of an object is the force of gravity on the object and may be defined as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton.

2- Momentum and conservation of energy : For a system, total Initial momentum is always equal to total final Momentum, and Total energy of an isolated system remains constant. That's, they are conserved. (KE is not conserved)

3- Work, Energy and their relationship : Work is transfer of energy. So, total work done for a system can be defined as change in its kinetic energy. (W = ∆KE)

4- Power : It is work done in a unit of time. (P = E/t)

Enough for today ! Hope it benefits you !