May/June 2026 Paper 11

2026 · 40 questions · 40 parts · 40 marks

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11Friction Drag Terminal VelocityMedium1 mark
A ball of mass 0.20 kg is falling vertically through a liquid and has not reached terminal velocity.
The upthrust on the ball is 0.65 N.
At one instant, the drag force on the ball is 0.50 N.
What is the magnitude of the resultant force on the ball at this instant?