A guy is standing in a lift falling freely under gravity and releases a ball from his hand. As seen by the ball, the boy:
Correct answer: B. Remains stationary
- A. Falls down
- B. Remains stationary
- C. Goes up
- D. None of above
Explanation
The acceleration of the body does not depend on the mass (for freely falling). Hence both boy and ball have same acceleration. Hence their velocities at every point would be same. So "Relative" velocity is 0. Hence the boy will remain stationary as seen by the ball.
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Newton’s law of universal gravitation relates the force between masses to their masses and separation, while gravitational field strength explains weight and orbital motion. The topic covers satellite velocity and period, escape ideas, weightlessness in free fall, and artificial gravity, which differs from ordinary gravitational attraction.
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