Beginner Projectile Motion problem

AI Thread Summary
To solve the projectile motion problem, the total time the cannonball is in the air can be calculated using kinematic equations, factoring in the initial speed, angle, and height of the building. The user calculated a time of 7.9 seconds but is uncertain about its accuracy. The horizontal distance from the base of the building can be determined using the horizontal component of the initial velocity and the total time in the air. Participants in the discussion are encouraged to verify the calculations and provide guidance on the correct approach. Accurate calculations are essential for understanding projectile motion in physics.
Myll
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Homework Statement


Fire a cannon ball at 30 degrees above the horizontal with an initial speed of 65 m/s from the top of a building 50 m high.

Find the total time the cannon ball is in the air.

What's the horizontal distance from the base of the building when the ball strikes the ground?


Homework Equations





The Attempt at a Solution


For the time I got 7.9 s, but I don't know if that's right.
 
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How did you arrive at that result?
 
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