A car is standing 200 m behind a bus, which is also at rest. The two start moving at the same instant but with different forward accelerations. The bus has acceleration 2 m/s2 and the car has acceleration 4 m/s2. The car will catch up with the bus after a time of :
s
s
10 s
15 s
As we learnt in
Case of Relative velocity. -
When A and B are moving along a straight line in the same direction.
= Velocity of object A.
= Velocity of object B.
Relative velocity of A wr to B is
All are in same direction.
- wherein
a)
= (20 - 5) ms-1
= 15 ms-1
b)
= (5 - 20) ms-1
= - 15 ms-1
Initial separation between bus and car
Option 1)
s
Incorrect
Option 2)
s
Incorrect
Option 3)
10 s
Correct
Option 4)
15 s
Incorrect
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