A small motor runs at a constant 250 W for the first 3.0 s of operation and then at a…

PHYSICS · Single correct · CBSE · Physics · Work and Energy · Work and Energy

Problem

A small motor runs at a constant 250 W for the first 3.0 s of operation and then at a constant 400 W for the next 2.0 s. Determine the total work done by the motor during the 5.0 s interval. (a) 1.63×103 J1.63\times10^{3}\,\text{J} (b) 2.00×103 J2.00\times10^{3}\,\text{J} (c) 1.55×103 J1.55\times10^{3}\,\text{J} (d) 1.25×103 J1.25\times10^{3}\,\text{J}

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