Chapter 8 – Work and Energy

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Work Work is done only when a force moves an object.
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Presentation transcript:

Chapter 8 – Work and Energy pp. 188-192

WORK The scientific meaning of work is that work is done on an object: only when a force makes an object move in the direction of the force AND only when the force is being applied to the object.

8.1 Work When thinking about work, remember that work is done by forces that cause movement. If nothing moves (distance is zero), then no work is done.

8.1 Work Force (N) W = F x d Work (joules) Distance (m)

8.1 Work Force A does no work because it does not cause the block to move. Force B is applied at an angle to the direction of motion, so only part of force B does work. The most effective force to move the block is force C.

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