describe a few situation in which friction causes an increase in kinetic energy
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Increase in kinetic energy due to friction
Explanation:
Friction
Generally, frictional force acts as an opposite force and affect the kinetic energy by decreasing the speed but in case of rolling motion situation is different .
To elaborate this, consider a sphere which is rolling on the surface . The torque produced due to frictional force provides a positive angular acceleration. Hence, frictional force gives the positive torque which accelerates sphere motion by enhancing its speed and results in the increase in kinetic energy.
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