A-LevelPhysicsKinematics9702/12 · Oct/Nov 2009 · Q41 Mark
On a particular railway, a train driver applies the brake of the train at a yellow signal, a distance of 1.0 km from a red signal, where it stops. The maximum deceleration of the train is 0.2 m s⁻². Assuming uniform deceleration, what is the maximum safe speed of the train at the yellow signal?
A20 m s⁻¹
B40 m s⁻¹
C200 m s⁻¹
D400 m s⁻¹
✓ Correct answer
A: 20 m s⁻¹
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