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Explore the forces at work when pulling against a cart, and pushing a refrigerator, crate, or person. Create an applied force and see how it makes objects move. Change friction and see how it affects the motion of objects.
- Friction
Explore the forces at work when pulling against a cart, and...
- Friction
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The second law is a description of how a body responds mechanically to its environment. The influence of the environment is the net force \(\vec{F}_{net}\), the body’s response is the acceleration \(\vec{a}\), and the strength of the response is inversely proportional to the mass m.
Newton's second law describes the affect of net force and mass upon the acceleration of an object. Often expressed as the equation a = Fnet/m (or rearranged to Fnet=m*a), the equation is probably the most important equation in all of Mechanics.
We will see in this section that work done by the net force gives a system energy of motion, and in the process we will also find an expression for the energy of motion. Let us start by considering the total, or net, work done on a system. Net work is defined to be the sum of work on an object.
This collection of Physics videos provide an organized presentation of commonly covered physics concepts and principles taught in an introductory Physics course.
Define net force, external force, and system. Understand Newton’s second law of motion. Apply Newton’s second law to determine the weight of an object. Newton’s second law of motion is closely related to Newton’s first law of motion. It mathematically states the cause and effect relationship between force and changes in motion.
