exam 3physics - -the work done by gravity on an apple -...

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Work - Work – the product of 2 magnitudes (scalar) -If we apply a force to an object and it moves some distance along the same line as the force, then we have done work on the object. - A small force acting over a large distance gives the same work as a large force acting over small distances - Work done on an object does not depend on whether the object moves thru the distance d quickly or slowly - Speed depends on rate at which work is done - When W=0 d=0 - When theta = 90, the work done by the force is 0; W= Fdcos90 = 0 - Work done by force: 1)work is the component of force in the direction of the displacement times the magnitude of the displacement 2)work is the component of displacement in the direction of the force times the magnitude of force - work is positive if the force has a component in the direction of motion (- 90<theta<90) work is zero if the force has no component in the direction of motion (90) work is negative if the force has a component opposite to the direction of
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exam 3physics - -the work done by gravity on an apple -...

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