Question

A person walking forward on the train says that he is moving at 3 kilometres per hour. A person on the platform says that the man on the train is moving at 115 kilometres per hour. Which person is correct? How could you get the two men to agree? plz do it with process

Answer 1

Answer:

As at the moment when the stone was dropped the train was stationary so the initial vertical velocity of the stone will be zero even with respect to the observer.

Now with respect to the passenger, the stone will have two acceleration one downward due to gravity and another in opposite motion of train because the passenger is on an accelerated frame of reference.

Now downward displacement is y=

2

gt

2

and horizontal displacement as x=−

2

at

2

where a is acceleration of train.

We see that both x and y are dependent on same power of time t i.e.,t

2

so path will be a straight line. just put t

2

=

a

2x

in exprexxion of y we get path equation as y=

a

gx

which is a stright line in xy plane

Option C is correct.

straight line is correct

I hope you understand my answer

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