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2 marksDynamics: Motion in a Straight Line

CSEC Physics · 1989 · Paper 2 · Question 3(c)(ii)

When a car stops suddenly, a driver might hit the windscreen like the one in Figure 4.

With reference to Newton's laws of motion explain how the wearing of a seat-belt helps to prevent such an accident.

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Other parts of this question

  1. 3(a)Write 'YES' or 'NO' in EACH of the boxes below to show whether each system possesses the energy indicated at the top of the column.[4 marks]
  2. 3(b)(i)Calculate the kinetic energy of the moving car.[2 marks]
  3. 3(b)(ii)Each of the four brake drums has a mass of 2.5 kg. Find the rise in temperature which occurs when the car is brought to rest. [Specific heat capacity of iron =…[3 marks]
  4. 3(c)(i)With reference to Newton's laws of motion explain why this might happen.[3 marks]
  5. 3(d)A car, carrying a passenger, stops suddenly. Describe the energy changes which take place as the passenger is brought to rest by his seat-belt.[2 marks]

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