Momentum is mass times velocity, so another way to think of momentum is in motion. inertia

weight

acceleration

velocity

Will pushing on a car always change the cars mechanical energy? what must happen for the cars kinetic energy to increases?

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?

Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.