PH-2368

Work done

Physics · Secondary 4 · Hard · Work done

A car of mass 900 kg is travelling at a speed of 20 m/s. It comes to rest after skidding 25 m along a straight road. Assuming the braking force is constant, what is the magnitude of the braking force on the car?

$3600\,\text{N}$
$4500\,\text{N}$
$7200\,\text{N}$
$14400\,\text{N}$

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