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Two forces that are unequal (one is stronger than the other), and cause a change in motion.
Newton's 1st Law
An object at rest, stays at rest and an object in motion tends to stay in motion, in the same direction and speed...unless acted on by a force.
Newton's 2nd Law
An object's acceleration depends on the size and direction of the force, and the mass of the object.
The tendency of an object to resist change in its movement, whether the object is moving or at rest.
A simple machine made up of one or more sloping sides used for raising, holding, or splitting an object.
wheel and axle
A simple machine made up of a large wheel connected by a smaller cylinder (axle) that is fastened to the wheel so they turn together.
A simple machine made up of a wheel with a groove and a rim, through which a chain or rope makes lifting easier.
A simple machine made up of an inclined plane wrapped around a center pole; it holds things in place.
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