PH-2363

Kinetic energy

Physics · Secondary 4 · Medium · Kinetic energy

A car of mass 900 kg is moving at 20 m/s. Using

E_k = \tfrac{1}{2}mv^2

, what is its kinetic energy?

$1.8 \times 10^5$ J
$3.6 \times 10^4$ J
$4.5 \times 10^5$ J
$9.0 \times 10^3$ J

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