Forces and Newton's second law with kinematics

A question is this type if and only if it combines kinematics with force calculations using F=ma, tension, resistance, or friction forces.

1 questions · Standard +0.3

Sort by: Default | Easiest first | Hardest first
Edexcel M1 Q5
12 marks Standard +0.3
Two trucks \(P\) and \(Q\), of masses 18 000 kg and 16 000 kg respectively, collide while moving towards each other in a straight line. Immediately before the collision, both trucks are travelling at the same speed, \(u\) ms\(^{-1}\). Immediately after the collision, \(P\) is moving at half its original speed, its direction of motion having been reversed.
  1. Find, in terms of \(u\), the speed of \(Q\) immediately after the collision. \hfill [5 marks]
  2. State, with a reason, whether the direction of \(Q\)'s motion has been reversed. \hfill [1 mark]
  3. Find, in terms of \(u\), the magnitude of the impulse exerted by \(P\) on \(Q\) in the collision, stating the units of your answer. \hfill [3 marks]
The force exerted by each truck on the other in the impact has magnitude \(108000u\) N.
  1. Find the time for which the trucks are in contact. \hfill [3 marks]