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KVPY2019PhysicsMotion in Two Dimensions

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

Options

  1. Aparabolic and in the direction of the moving train
  2. Bparabolic and opposite to the direction of the moving train
  3. Can inclined straight line pointing in the direction of the moving train
  4. Dan inclined straight line pointing opposite to the direction of the moving train

Correct answer

D. an inclined straight line pointing opposite to the direction of the moving train

Step-by-step 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. Resultant of these accelerations are as shown below. Hence, trajectory of falling apple is an inclined straight line opposite to the direction of train.

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