PH-1461

Resultant force and F = ma

Physics · Secondary 4 · Medium · Resultant force and F = ma

A swimmer of mass

70\,\text{kg}

accelerates at

0.80\,\text{m s}^{-2}

as he pushes off from the pool wall. The resistive force of the water is

140\,\text{N}

opposite to his motion. What is the forward force he exerts on the water?

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