Question

A car and a truck have the same speed of 30m/s.If their masses are in the ratio 1:3 find the ratio of their K.E.

Answer 1

Hi friend
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Your answer
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Velocity of a car and a truck = 30 m/s

Ratio of their masses = 1:3

Ratio of their kinetic energies =
$\frac{ \frac{1}{2} \times 1 \times (30) {}^{2} }{ \frac{1}{2} \times 3 \times (30) {}^{2} } \\ \\ = > \frac{1}{3} \\ \\ ratio \: = 1 \: is \: to \: 3$
Therefore,
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Ratio of their kinetic energies is also 1:3.

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