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1.5 Forces

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Question 51

A freight train accelerates uniformly along a straight, horizontal track. The mass of the train is 3.5×104 kg3.5 \times 10^4\text{ kg}3.5×104 kg.

a.

The speed of the train increases from rest to 16 m/s16\text{ m/s}16 m/s in 20 s20\text{ s}20 s.

Calculate: (i) the distance travelled by the train during this time,

[2]
b.

The speed of the train increases from rest to 16 m/s16\text{ m/s}16 m/s in 20 s20\text{ s}20 s.

Calculate: (ii) the resultant force on the train.

[3]
c.

To maintain a uniform acceleration, the forward driving force on the train must change. Explain why.

[3]
Markscheme

1.5 Forces Questions

  1. IGCSE
  2. /Physics
  3. /1.5 Forces

245 exam-style questions on CIE IGCSE Physics 1.5 Forces, covering 1.5.1a Forces, resultant force and motion, 1.5.1b Load–extension graphs and the spring constant, 1.5.1c Friction and drag, 1.5.1d Force, mass and acceleration, 1.5.1e Motion in a circular path, 1.5.2a Moment of a force, 1.5.2b Principle of moments and equilibrium, and 1.5.3 Centre of gravity and stability. Each one has a worked solution and a mark scheme showing where the marks go.

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