energy changes which occur when we draw a pendulum bob to
one side and allow it to oscillate. Why does the bob eventually
come to rest? What happens to its energy eventually? Is it a
violation of the law of conservation of energy?
An object of mass, mis moving with a constant velocity. 0.
How much work should be done on the object in order to bring
the object to rest?
Calculate the work required to be done to stop a car of 1500 kg
moving at a velocity of 60 km/h?
In each of the following a force, F is acting on an object of
mass, m. The direction of displacement is from west to east
shown by the longer arrow. Observe the diagrams carefully
and state whether the work done by the force is negative
positive or zero
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the same time as a great day of school and again and
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