David Sang and Graham Jones Solutions for Chapter: Momentum, Exercise 11: EXAM-STYLE QUESTIONS

A railway truck of mass $8000 \mathrm{kg}$ travels along a level track at a velocity of $2.5{ \mathrm{ms}}^{-1}$ and collides with a stationary truck of mass $12000 \mathrm{kg}$. The collision takes $4.0 \mathrm{s}$ and the two trucks move together at the same velocity after the collision. What is the average force that acts on the $8000 \mathrm{kg}$ truck during the collision?

(A) $2000 \mathrm{N}$

(B) $3000 \mathrm{N}$ 

(C) $5000 \mathrm{N}$

(D) $12000 \mathrm{N}$