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NDA General Science Physics Questions Part 2

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Question : 82

Total: 100

Two balls, A and B are thrown simultaneously, A vertically upward with a speed of 20 m/s from the ground and B vertically downward from a height of 40 m with the same speed and along the same line of motion. At what points do the two balls collide by taking acceleration due to gravity as 9.8m/s2 ?

The balls will collide after 3s at a height of 30.2 m from the ground
The balls will collide after 2s at a height of 20.1 m from the ground.
The balls will collide after Is at a height of 15.1 m from the ground
The balls will collide after 5s at a height of 20m from the ground

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