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Erase all the trajectories, and fire the pumpkin vertically again with an initial speed of 14 m/s. As you found earlier, the maximum height is 9.99 m. If the pumpkin isn't fired vertically, but at an angle less than 90∘, it can reach the same maximum height if its initial speed is faster. Set the initial speed to 22 m/s, and find the angle such that the maximum height is roughly the same. Experiment by firing the pumpkin with many different angles. What is this angle?

Respuesta :

Answer:

[tex]\theta=39.49^{\circ}[/tex]

Explanation:

Maximum height of the pumpkin, [tex]H_{max}=9.99\ m[/tex]

Initial speed, v = 22 m/s

We need to find the angle with which the pumpkin is fired. the maximum height of the projectile is given by :

[tex]H_{max}=\dfrac{v^2\ sin^2\theta}{2g}[/tex]

On rearranging the above equation, to find the angle as :

[tex]\theta=sin^{-1}(\dfrac{\sqrt{2gH_{max}}}{v})[/tex]

[tex]\theta=sin^{-1}(\dfrac{\sqrt{2\times 9.8\times 9.99}}{22})[/tex]

[tex]\theta=39.49^{\circ}[/tex]

So, the angle with which the pumpkin is fired is 39.49 degrees. Hence, this is the required solution.

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