Newton's Second Law

Newton's second law is closely related to his first law of motion. It mathematically gives the cause-and-effect relationship between force and changes in motion. Newton's second law is quantitative and is used extensively to calculate what happens in situations involving a force. All external forces acting on a system add together to produce a n...

Consider a lady pushing a luggage cart as she moves. The external force exerted by her accelerates the cart in the direction of the applied force.

If she pushes with a greater force, the cart will move faster. To stop the cart, she needs to apply an external force in the direction opposite to her motion.

If she places more luggage ...