A playground roundabout has a platform of radius that completes one rotation in
PHYSICS · Multi-part · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion
Problem
A playground roundabout has a platform of radius 2.5m that completes one rotation in 8s. During a test, the caretaker reduces the time period to 6s while keeping the radius unchanged.
(i) Calculate the initial speed of a child standing at the edge of the roundabout.
(ii) Determine the new speed after the time period is reduced.
(iii) By what percentage has the speed increased? Round off your answer to the nearest whole number.