Question

a cyclist goes around a circular track of diameter 105 metre in 5 minutes calculate his speed and velocity at the end of 7 minute 30 second

Answer 1

Given,
Diameter =105m
Therefore, radius = d/2 = 105/2= 52.5m
Time = 5 min = 5*60s= 300s
Distance or circumference of the circular track = 2πr = 2*22/7*52.5=330m
Speed = distance / time = 330/300 m/s =1.1m/s
Velocity = displacement / time
Here the given time is 7min 30s=7*60+30 s= 450s
Displacement is 105m
Therefore, v= 105/450=0.25m/s