GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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its velocity is zero and its acceleration is zero.
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its velocity is zero and its acceleration is positive (upward).
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its velocity is zero and its acceleration is negative (downward).
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its velocity is positive (upward) and its acceleration is zero.
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its velocity is positive (upward) and its acceleration is zero.
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Detailed explanation-1: -You toss a ball straight upward, in the positive direction. The ball falls freely under the influence of gravity. its velocity is zero and its acceleration is zero.
Detailed explanation-2: -When a ball is thrown vertically upward, the acceleration due to gravity always acts downward to the ball. When the ball is moving up the acceleration due to gravity will decrease the velocity of the ball and finally, the velocity will become zero at the maximum height.
Detailed explanation-3: -A2A: The acceleration is downward in both cases and is caused by gravity. If the positive direction is upward then the acceleration is negative.
Detailed explanation-4: -Determination of acceleration at the highest point The acceleration (a) is equal to the acceleration due to gravity (g). Thus, the acceleration of the ball at the highest point is., acting in the downward direction.
Detailed explanation-5: -Analyzing motion for objects in freefall For example, when a ball is thrown up in the air, the ball’s velocity is initially upward. Since gravity pulls the object toward the earth with a constant acceleration g, the magnitude of velocity decreases as the ball approaches maximum height.