Question

A cannon tilted up at a 26.0 ∘ angle fires a cannon ball at 77.0 m/s from atop a 11.0 m -high fortress wall.

What is the ball's impact speed on the ground below?

Answer 1

Given initial launch velocity,

Initial vertical launch velocity,

Initial horizontal launch velocity,

Initial launch height,

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Consider the vertical motion of the projectile

Use formula

At the max height, vertical velocity becomes zero

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Max height,

Use formula  

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Consider horizontal motion of the projectile

There is no acceleration in horizontal direction, so horizontal velocity remains constant.

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ANSWER:

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