CBSE Class 9 Physics Work and Energy
Work is a scalar quantity and its SI unit is joule.
Work done is positive if the angle between force and displacement is acute and negative if the angle between them is obtuse.
The energy possessed by a body by virtue of its motion is called kinetic energy.
The energy possessed by a body by virtue of its position or change in configuration is called potential energy.
Power is the rate at which work is done.
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