Question

if a bus is move with velocity 50 km per hour .a bike also moves with a speed 55 km per hour in same direction if the distance between the bike and the bus is 10 km in how much time bike will catch the bus .​

Answer 1

Answer:

Correct option is

A

8 s

Velocity of bus Vb=0 , Velocity of cyclist Vc=20m/s, 

Acceleration of bus ab=2m/s2 Acceleration of cyclist ac=0

Relative velocity Vcb=Vc−Vb=20m/s

Relative acceleration acb=ac−ab=−2m/s2

Relative separation =96m

Using s=ut+21at2

⇒96=20t−212t2   ⇒t2−20t+96=0

Solving the equation , we get t=8s and t=12s

Hence, after 8s, cyclist will overtake the bus.

Explanation:

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