Motion in a Straight Line - Result Question 33

34. A bus is moving with a speed of 10ms1 on a straight road. A scooterist wishes to overtake the bus in 100s. If the bus is at a distance of 1km from the scooterist, with what speed should the scooterist chase the bus?

(a) 40ms1

(b) 25ms1

(c) 10ms1

(d) 20ms1

[2009]

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Answer:

Correct Answer: 34. (d)

Solution:

  1. (d) Let v be the relative velocity of scooter w.r.t bus as v=vSvB

v=1000100=10ms1VB=10ms1

vS=v+vB,

=10+10=20ms1

velocity of scooter =20ms1

When two bodies are moving in same directions, relative velocity is between difference individual velocities.

VAB=VAVB



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