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A ball is thrown with a speed of 20 m s...

A ball is thrown with a speed of 20 m ` s^(-1)` at an elevation angle ` 45^(@)`. Find its time of flight and the horizontal range ( take g = ` 10 ms ^(-2)`)

Text Solution

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Here `v_(0)" m "s^(-1), 0_(o) = 45^(@)`
time of flight `T_(t) = (2v_(0)sin theta_(0))/(g) = (40)/(10sqrt(2))`
= `2sqrt(2)` s
Horizontal range when `theta = 45^(@)` is given by
`R("max") = (v_(0)^(2))/(g) = (400)/(10) = 40`m
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