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8 marksWork, Energy and Power

CAPE Applied Mathematics Unit 2 · 2008 (second paper) · Paper 2 · Question 5(b)(i)

A vehicle of mass 6000 kg travelling along a straight road with velocity 2.5 m s^-1 collides with another vehicle of mass 2000 kg moving in the same direction with velocity 1.3 m s^-1. After impact, the vehicles coalesce and move as a single unit.

Calculate the kinetic energy after impact.

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Other parts of this question

  1. 5(a)(i)State the principle of conservation of energy.[3 marks]
  2. 5(a)(ii)State the principle of conservation of linear momentum.[3 marks]
  3. 5(b)(ii)Calculate the distance and the time required to bring the vehicle to rest by a braking force of 1000 N applied immediately after the impact.[11 marks]

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