GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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constant acceleration, then constant deceleration
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constant deceleration, then zero acceleration
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decreasing acceleration, then constant deceleration
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decreasing acceleration, then zero acceleration
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Detailed explanation-1: -Since the object is released closer to the Earths surface the acceleration due to the force of gravity is constant. As the object comes closer to the Earths surface its acceleration begins to decrease due to the gravitational pull and the object begins to decelerate. Eventually the acceleration becomes zero.
Detailed explanation-2: -When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion? Its acceleration is constant.
Detailed explanation-3: -The force of gravity causes objects to fall toward the center of Earth. The acceleration of free-falling objects is therefore called the acceleration due to gravity.
Detailed explanation-4: -Hint: When an object falls freely on the ground, the force of the gravity works on it. So the acceleration on the object is the acceleration due to gravity. So the acceleration is uniform on the freely falling body.
Detailed explanation-5: -Whether explicitly stated or not, the value of the acceleration in the kinematic equations is-9.8 m/s/s for any freely falling object. If an object is merely dropped (as opposed to being thrown) from an elevated height, then the initial velocity of the object is 0 m/s.