A cyclist travelling at applies the brakes and comes to rest after moving with…
PHYSICS · Multi-part · CBSE · Physics · Motion in a Straight Line · Motion in a Straight Line
Problem
A cyclist travelling at 18km/h applies the brakes and comes to rest after moving 10m with uniform retardation. Immediately afterwards, the cyclist starts pedalling again with a uniform acceleration of 0.8m/s2 for 6s.
(i) Convert the initial speed of the cyclist into SI units.
(ii) Calculate the magnitude of the uniform retardation while the brakes are applied.
(iii) Determine the speed of the cyclist at the end of the 6s acceleration period.
(iv) Find the total displacement of the cyclist from the instant the brakes are first applied until the end of the acceleration period.