PH-232

Resultant force and F = ma

Physics · Secondary 3 · Hard · Resultant force and F = ma

A wooden block of mass

0.80\,\text{kg}

is pulled along a rough horizontal surface by a horizontal force of

10\,\text{N}

. The block accelerates at

7.5\,\text{m/s}^2

. Using

F = ma

, what is the magnitude of the frictional force on the block?

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