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  4. A girl drops an apple from the window of a train which is moving on a straight track with speed increasing with a constant rate. The trajectory of the falling apple as seen by the girl is

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Q. A girl drops an apple from the window of a train which is moving on a straight track with speed increasing with a constant rate. The trajectory of the falling apple as seen by the girl is

KVPYKVPY 2019

Solution:

As the apple is released, it has two accelerations
$a_1 =$ pseudo acceleration due to acceleration to train
and $a_2 =$acceleration due to gravity
image
Resultant of these accelerations are as shown below.
image
Hence, trajectory of falling apple is an inclined straight line opposite to the direction of train