Physics

Problem

An object of mass 2.5 kg falls vertically through the air with a downwards acceleration of

4.81 \text{ ms}^{-2}

. Taking

g = 9.81 \text{ ms}^{-2}

, the size of the air resistance force acting on the object is a. Zero. b. 5.81 N. c. 12.5 N. d. 24.5 N.