Beginner Projectile Motion problem

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SUMMARY

The discussion centers on solving a projectile motion problem involving a cannonball fired at a 30-degree angle with an initial speed of 65 m/s from a height of 50 m. The total time the cannonball remains in the air is calculated to be 7.9 seconds. Participants are encouraged to verify this result and discuss the methodology used to arrive at the time and the horizontal distance traveled upon impact.

PREREQUISITES
  • Understanding of projectile motion principles
  • Familiarity with kinematic equations
  • Knowledge of trigonometric functions for angle calculations
  • Ability to apply initial velocity and height in motion equations
NEXT STEPS
  • Review kinematic equations for projectile motion
  • Learn how to calculate horizontal distance using initial velocity and time
  • Study the effects of launch angle on projectile trajectory
  • Explore advanced projectile motion problems involving air resistance
USEFUL FOR

Students studying physics, educators teaching projectile motion concepts, and anyone interested in solving real-world motion problems.

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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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