Engineering Mechanics
The total energy possessed by a system of moving bodies

Varies from point to point
Is minimum in the start and maximum at the end
Is constant at every instant
Is maximum in the start and minimum at the end

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Engineering Mechanics
One joule means that

Work is done by a force of 1 dyne when it displaces a body through 1 cm
Work is done by a force of 1 kg when it displaces a body through 1 m
Work is done by a force of 1 N when it displaces a body through 1 m
Work is done by a force of 1 g when it displaces a body through 1 cm

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