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The first part of the question, calculating the acceleration, uses the fact that acceleration equals the change in velocity divided by the time. In this case, the change in velocity is 20-0 and the time i...
A see-saw represents a pivot, for the see-saw to balance the moment on the left hand side has to equal the moment on the right hand side. Moment = Force * distance Therefore the moment of the right hand ...
Internal energy, temperature, and heat are closely related but distinct concepts. The microscopic particles that make up a body are in constant motion and may exert forces on ea...
There are two types of wave: longitudinal and transverse. It's really important to learn their properties as this is a very common question. The main thing to remember is longitudinal waves have oscillati...
Tensile stress is the force exerted per unit cross-sectional area on an object.
Tensile strain is the extension per unit original length of an object.
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