Teaching HTET PGT Level 3 - 2024 Mock Test Physics Motion in Two and Three Dimensions Relative Motion
The headlight of a train of length 200 m is switched on when it starts from rest with an acceleration of 0.5 ms–2. After 20 s, its tail-light is switched on. An observer in a frame moving with a constant velocity parallel to the railway track observes that the two events occur at the same place. The velocity of this frame is
1
5 ms–1 in a direction opposite to the train’s motion
2
10 ms–1 in a direction opposite to the train’s motion
3
5 ms–1 in the same direction as the train’s motion
4
10 ms–1 in the same direction as the train’s motion