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1.5.1a Forces, resultant force and motion

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Question 46

A motorboat accelerates from rest in a straight line across a calm lake. The boat's engine exerts a constant horizontal driving force. The resistive force (drag) from the water is proportional to the speed of the boat.

Why does the boat eventually reach a constant maximum speed?

A

The resistive forces decrease to make the acceleration of the boat negative.

B

The resistive forces decrease to make the acceleration of the boat zero.

C

The resistive forces increase to make the acceleration of the boat negative.

D

The resistive forces increase to make the acceleration of the boat zero.

Markscheme

1.5.1a Forces, resultant force and motion Questions

  1. IGCSE
  2. /Physics
  3. /1.5.1a Forces, resultant force and motion

183 exam-style questions on CIE IGCSE Physics 1.5.1a Forces, resultant force and motion. Each one has a worked solution and a mark scheme showing where the marks go.

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