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One of the properties of elasticity is that it takes about twice as much force to stretch a spring twice as far. That linear dependence of displacement upon stretching force is called Hooke's law.
A java applet that shows the effect of buoyant force acting on an object less dense than water.
This java applet gives a practical demonstration of lorentz force when a charge q is applied to a magnetic field.
An imaginary force sometimes used to simplify calculations involving rotating systems, such as the movement of air, water and projectiles over the surface of a rotating earth.
Revision pages for UK GCSE level covering forces, moments and pressure. Clear and well presented, includes animated diagrams and questions.
A definition of the Coriolis force including maths from Eric Weisstein's World of Physics.
The driver of a car on a curve is in a rotating reference frame and they could use "centrifugal" force to explain why a mug and the carton of eggs on the seat beside them tend to slide sideways.
This page allows you to calculate the force with which an object impacts the ground.
All four of the fundamental forces involve the exchange of one or more particles.
Frictional resistance to the relative motion of two solid objects is usually proportional to the force which presses the surfaces together as well as the roughness of the surfaces. Since it is the ...
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