A box of mass is pushed horizontally with a force of to the right

PHYSICS · Single correct · CBSE · Physics · Force and Laws of Motion · Force and Laws of Motion

Problem

A box of mass 20 kg20\,\text{kg} is pushed horizontally with a force of 70 N70\,\text{N} to the right. A frictional force of 10 N10\,\text{N} acts to the left. Calculate the magnitude of the box's acceleration. (a) 4 m s−24\,\text{m\,s}^{-2} (b) 3 m s−23\,\text{m\,s}^{-2} (c) 2 m s−22\,\text{m\,s}^{-2} (d) 3.5 m s−23.5\,\text{m\,s}^{-2}

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