JEE Main Physics question
A car is travelling on a straight level road with a uniform speed of 60 km/h. It is followed by another car which is moving with a speed of 70 km/h. When the distance between them is 2.5 km, the car is given a deceleration of 20 km/h. After how much time will catch up with
Answer: (B)
Solution
Relative: h (critical/tangent case).