ICSE Class 10 Physics 2023 Solved Paper

Question : 25 of 76

Marks: +1, -0

Calculate the power spent by a crane while lifting a load of mass

2000 {\kg}

, at velocity of

1.5 {\ms}^{-1} ⋅ ( {\g}=10 {\ms}^{-2})

Solution:

Given :

m=2000 {\kg}, v=1.5 {\ms}^{-1}

g=10 {\ms}^{-2}, {\P}=\;\text " ? "\;

We know,

\;\text " Power "\;( {\P})\;=\;{{\Work}( {\W})}/{{\time}(t)}

\;=\;{m g h}/{t} \;\; ( ∵ {\W}=m g h)

\;=m g × v \;\; ( ∵ \;{h}/{t}=v)

\;=2000 × 10 × 1.5 {\watt}

\;=30,000 {\watt}

Go to Question:

Prev Question

Next Question