Question

A box of mass 0.80 kg is pushed on a horizontal surface by a force of 4.8N and a frictional force of 1.5N and air resistance KV square, were K =0.60kg/m and V is speed.
a) Draw a diagram and label the forces actx on the box.
b) calculate the maximum speed of the box

Answer 1

$$F=F_f+kv^2\\4.8=1.5+0.6v^2\\v=2.35\frac{m}{s}$$