4) A person running along a circular track of radius 100 m completes one revolution in 4 minutes. The average speed of the person is. a) 50 nm/s b) 50 nm/min c) 100 nm/s d) 100 nm/min
Answers
Answer:
b
Explanation:
a car runs is formula per hai mawj
Answer:
The average speed of the person is 2.6 m/s.
Explanation:
The person is moving around a circular track of radius 'r' and completes one full revolution around it.
The radius of the circle, r = 100 m
The total distance covered by the person will be equal to the circumference of the circle. ie;
Total distance covered by the person, d = 2πr
= 2 × π × 100
= 628 m
Total time taken to cover this distance, t = 4 min
= 4 × 60 = 240 s
∴ Average speed = total distance / total time
= 628 / 240
= 2.6 m/s