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Problem ~a ballon is accending upwards with a velocity u m/s .after some time a stone is dropped .it takes t seconds to reach the ground ..find the distance travelled by stone.......sir my question is why do we take “u” negative ?

5 years ago

Answers : (1)

Abhinav
askIITians Faculty
387 Points
							Because ballon is moving upward and stone dropped goes downward. Both have opposite direction of motion so you may take either of them negetive according to your convenience
						
5 years ago
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