SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A small cart is rolling at constant velocity on a flat track. It fires a ball straight up into the air as it moves. After it is fired, what happens to the ball?
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it depends on how fast the cart is moving
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it falls behind the cart
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it falls in front of the cart
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it falls right back into the cart
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it remains at rest
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Explanation:
Detailed explanation-1: -When a person, sitting in an enclosed train car traveling at a constant velocity, throws a ball into the air in her reference frame, the ball will land at the same point from which the person threw it. Thus, the ball will land at the same point on the thrower’s hand.
Detailed explanation-2: -According to Newton’s first law of motion, any object moving at constant velocity has no net external force acting upon it, which means that the sum of the forces acting on the object must be zero.
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