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A projectile is thrown with a velocity o...

A projectile is thrown with a velocity of `10sqrt(2) ms^(-1)` at an angle of 45° with the horizontal. The time interval between the moments when the speeds are `sqrt(125) ms^(-1)` is (g=10`ms^(-2)`)

Text Solution

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`u_(n) = 10, u_(y)=0`
`v^(2) =v_(x)^(2) + v_(y)^(2)`
`125 = 100 +v_(y)^(2)`
`Deltat =(2v_(y))/g =(2 xx 5)/10 = 1s`
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