An object is released from rest and falls to Earth. During its fall, the object is affected by air resistance. The air resistance eventually reaches a constant value.Which description about successive stages of the motion of the object is correct?
A constant acceleration, then constant deceleration
B constant deceleration, then zero acceleration
C decreasing acceleration, then constant deceleration
D decreasing acceleration, then zero acceleration
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Answer: D is the correct answer
Explanation:
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An object is released from rest and falls to Earth. During its fall, the object is affected by air resistance. The air resistance eventually reaches a constant value.Which description about successive stages of the motion of the object is correct? D) decreasing acceleration, then zero acceleration
Explanation:
- As the object is released from rest and falls to Earth its gravitational potential energy is converted to kinetic energy.
- 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.
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