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Tuesday, 2 April 2013

Q.No.3.2: - An object is thrown vertically upward. Discuss the sign of acceleration due to gravity relative to velocity, while the object is in air.

Q.No.3.2: - An object is thrown vertically upward. Discuss the sign of acceleration due to gravity relative to velocity, while the object is in air.
Ans: - When the object is thrown vertically upward then the body will displace in the upward direction so the direction of velocity is in the upward direction but we noticed that after covering so vertical upward distance the body will slow which shows that the velocity decrease. At this time the direction of acceleration will be downward because the direction of change in velocity is downward.
          During the downward flight  we noticed that the body we move rapidly from the extreme position which means that the velocity will increase and at that time the direction of acceleration will be toward the downward direction. So we can say that in both the flights the sign of gravitational acceleration “g” is downward.

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