Question

I need help with these questions :
(see image )

Answer 1

Hey There!

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Answer:

`\huge\boxed{Theta=25.67}`

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DATA:

Range = R = 78m

Initial Velocity =
`V_i` = 30m/s

Angle(theta) = ?

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SOLUTION:

The Range is given by,

`R =(V_0^2)/(g)Sin2(theta)\\\\78 = (30^2)/(10)Sin2(theta)\\\\Sin2(theta) = (780)/(900)\\\\Sin2(theta) = (13)/(15)\\\\Sin(theta) = (13)/(30)\\\\theta = Sin^(-1)(13)/(30)\\\\theta = 25.67^0`

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Best Regards,

'Borz'