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A body is projected vertically upwards w...

A body is projected vertically upwards with a velocity `u`. It crosses a point in its journey at a height `h` twice just after 1 and 7 seconds. The value of `u` in `ms^(-1)` is `(g=10ms^(-2))`

A

50

B

40

C

30

D

20

Text Solution

Verified by Experts

The correct Answer is:
B
`u = (1)/(2)g(t_(2)- t_(1))`
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