Question
Bike βAβ is 150 metres ahead of bike βBβ. Bike
βAβ is travelling at 16 m/s and bike βBβ is travelling at 54 km/h. If both bikes are moving in the same direction, how long will bike βBβ take to overtake bike βAβ?Solution
Speed of bike βBβ = 54 Γ· 3.6 = 15 m/s
So, relative speed of bike βBβ with respect to bike βAβ = 15 β 16 = β1 m/s
Since the relative speed is negative, bike βBβ will never overtake bike βAβ.
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