Question

I need help with these questions :
(see image )​

Answer 1

Hey There!

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Answer:

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DATA:

Range = R = 20 km = 20 000m

Initial Velocity =
`V_i` = 500 m/s

Angle = θ(theta) = ?

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The range of projectile is given by,

`R = (V_i^2)/(g)xSin2(theta)`

Substitute the variables,

`20000 = (500^2)/(10) x Sin2(theta)\\\\(200000)/(250000) = Sin2(theta)\\\\(4)/(5) = Sin2(theta)\\\\Sin(theta) = (4)/(2x5)\\\\Sin(theta) = (4)/(10)\\\\Sin(theta) = (2)/(5) \\\\theta = Sin^(-1)((2)/(5))\\\\theta(angle) = 23.57^0`

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Best Regards

'Borz'