A passenger train travels round a circular section of track of radius 400 m at a…
PHYSICS · Multi-part · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A passenger train travels round a circular section of track of radius 400 m at a speed of 72 km h⁻¹.
(i) Convert the train’s speed to SI units.
(ii) Calculate the magnitude of the acceleration directed towards the centre of the track.
(iii) Express this acceleration as a fraction of the acceleration due to gravity g=9.8m s−2. Round your answer to two significant figures.