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1.5 Forces

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Question 102

A helium-filled balloon is released and rises vertically through the air. Under what condition does the balloon reach its terminal velocity?

A

When the upward buoyant force is equal to the weight of the balloon.

B

When the drag force is equal to the weight of the balloon.

C

When the upward buoyant force is equal to the sum of the weight and the drag force.

D

When the acceleration of the balloon is equal to the acceleration of free fall, ggg.

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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