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Physics
A body thrown upwards reaches a height and comes back. Which of the following is true about the acceleration due to gravity ?
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Q. A body thrown upwards reaches a height and comes back. Which of the following is true about the acceleration due to gravity ?
KCET
KCET 1996
Gravitation
A
It varies continuously with the maximum at the beginning and zero at the top.
41%
B
It only changes sign when the body is at the top
17%
C
It remains constant throughout
34%
D
it varies but never changes sign.
7%
Solution:
g is a vector quantity and it acts always towards the centre of earth. It is taken as negative if the direction of motion is away from ground. Its magnitude changes with height.