Question

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A car is moving towards east with the velocity of 20 m/s and another car is moving towards west with the velocity of 15 m/s. If those cars start to move from the same place, calculate the distance between them after two minutes. (2)
Solution,
Here,
Va = 20 m/s
Vb = 15 m/s
Time (t) = 2 minutes = 60sec x 2 = 120 seconds
First,
Relative velocity = Va + Vb
= 20 m/s + 15 m/s
= 35 m/s
Now,
If we calculate the difference of distance between the car by multiplying the relative velocity of 35 m/s by 2 minutes
Then,
Vab after 2 minutes = 35 m/s x 120
= 4200 m
.. The distance between the two cars after two minutes is 4200m (4.2km)

Answer 1

Answer:

this is correct answer. ..