An insulated block with a mass of 100 kg is acted upon by a horizontal force of

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An insulated block with a mass of 100 kg is acted upon by a horizontal force of 0.02 kN. Balanced by frictional forces, the body moves at a constant velocity of 2 m/s. Determine
(a) The rate of change of stored energy in the system.
(b) Power transferred by the external force.
(c) How do you account for the work performed by the external force?
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