Question

Two parallel rail tracks run north-south. Train X moves north with a speed of 48kmph and train Y moves south with a speed of 72kmph. What is the
(a) Relative velocity of Y with respect to X?
(b) Relative velocity of ground with respect to Y?
(c) Relative velocity of monkey running on the top of train X as observed by a man standing on the ground if the velocity of monkey is 12kmph against the motion of train X?

Answer 1

Here's your answer in the give attachment :-

the relative velocity of ground with respect to Y will be the negative of the given velocity of Y.

cuz if you look at the ground from train then it appears to be moving towards the opposite direction to the train.

thank you ☺️

let me know in case of any error

Answer 2

Answer:

Refer the attachement for better understanding

U can also covert to physical quantitiy of speed m/s or u can also leave the quantity as kilometreper hour

- sign comes when the speed get retards

The speed in the direction to North.. Gains ⬆️

Speed in the direction to south retards ⬇️

Kilometreperhour get covered to m/s

Term x 5/18

I tried my best ✌️