Q. A bus is moving with a speed of 10 m s⁻¹ on a straight road. A scooterist wishes to overtake the bus in 100 s. If the bus is at a distance of 1 km from the scooterist, with what speed should the scooterist chase the bus?
A) 40 m s⁻¹
B) 25 m s⁻¹
C) 10 m s⁻¹
D) 20 m s⁻¹
Explanation
[Solution from source] The scooter must close 1000 m in 100 s, so its speed relative to the bus is 10 m s⁻¹. Its ground speed = 10 + 10 = 20 m s⁻¹. Answering 10 m s⁻¹ gives only the relative speed. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.