ICSE Class 10 Physics 2023 Solved Paper

A car of mass $120 {\kg}$ is moving at a speed 18 ${\km} \/ {\h}$ and it accelerates to attain a speed of $54 {\km} \/ {\h}$ in 5 seconds. Calculate :

Question : 54 of 76

Marks: +1, -0

the power of the engine.

Solution:

Given :

m=120 {\kg}

\;u=18 {\km} \/ {\h}=18 × \;{1000}/{60 × 60}=5 {\m} \/ {\ s}

\;v=54 {\km} \/ {\h}=54 × \;{1000}/{60 × 60}=15 {\m} \/ {\ s}

\;\text " Pōwēr "\;\;=\;{\;\text " Work "\;}/{\;\text " time "\;}

\;=\;{12000}/{5}

\;=2400 {\watt}

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