Question

A plane accelerates from 10 m/s to 40 m/s in 5 seconds. If the net force on the plane is 24,000 N, what is the mass of the plane?

Answer 1

$$F=ma=m\frac{v_f-v_i}{t}$$

$$24000=\frac{40-10}{5}m$$

$$m=4000\ kg$$