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Work, Power And Energy — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceWork, Power And Energy2 Marks
Question
The power output of an engine is $3\ kW.$ How much work does the engine do in $20s?$
✓

Answer

Power $= 3\ kW$
Time $= 20s$ $\text{Power}=\frac{\text{Work done}}{\text{Time}}$
Work done $=$ Power $×$ time $= 3 × 20\ kWs = 60\ kJ$

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