Physics (AS & A Level) · May / June 2025 · Paper 12 · Question 7
9702Momentum and Newton’s laws of motion
A solid object of mass 1.0 kg falls vertically downwards in a vacuum. When the speed of the object is 60 m s–1, an additional constant force of 50 N suddenly starts to act vertically upwards on the object. What is the speed of the object 2.0 s after the additional force starts to act?
- A20 m s–1
- B40 m s–1
- C80 m s–1
- D100 m s–1
As printed in the paper
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Correct answer: A. 20 m s–1
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