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In the figure shown, find . (a) the...

In the figure shown, find
.
(a) the time of flight of the projectile over the inciled plane.
(b) range OP.

Text Solution

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The correct Answer is:
A, B, D
(a) Let the particle strikes the plane at point P at time t, then
`OQ = 1/2 g t^2 = 5t^2`
`QP = 20t `
In `Delta OPQ,` angle OPQ is` 45^@` .
`:. OQ=QP` or `5t^2 = 20t `
`:. t = 4s`
(b) `OP = QP s 45^@= (20t)(sqrt2)`
Substituting `t=4s`, we have
`OP = 80(sqrt2) m .`
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