A bus is moving with a speed of 10 m s⁻¹ on a straight road. A scooterist wants 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?
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Question

A bus is moving with a speed of 10 m s⁻¹ on a straight road. A scooterist wants 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?

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G1 Physics · Accepted Answer

Step 1: The scooterist must close 1000 m in 100 s, so required relative speed with respect to the bus is 10 m s⁻¹. Step 2: Bus speed is 10 m s⁻¹, hence scooter speed =10+10=20 m s⁻¹. Final answer: A.