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CAIE IGCSE Physics 1.5.1.7 Friction Drag Acts on an Object Questions

Practise identifying forward engine and opposing resistive forces, and explain why the engine force must exceed resistance when an object accelerates.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • Identify engine and resistive forces and explain why engine force exceeds resistance when acceleration occurs.

CAIE IGCSE Physics 1.5.1.7 Friction Drag Acts on an Object Questions question 1

[Maximum number: 1]

A ship sails in a straight line between two ports.
Fig. 1.1 shows the speed-time graph of the ship for the first 100 minutes of its journey between the two ports.

Fig. 1.1

Fig. 1.1

At a time not shown on the graph, the acceleration of the ship is 0.0087 m/s20.0087 \mathrm{~m} / \mathrm{s}^{2}. The total mass of the ship and its passengers is 2.3×107 kg2.3 \times 10^{7} \mathrm{~kg}.

Explain why the force on the ship due to the ship's engine is greater than the value you calculated in (c)(i).

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