Using Kinematics equasions to solve

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SUMMARY

Kelsi and Sara conducted an experiment to determine the height of a building using kinematic equations. Kelsi measured the height of a window at 4.0 ft and recorded the time it took for a super ball to drop past the window and bounce back. The total time recorded was 1.125 seconds, with the ball taking 0.125 seconds to pass the window on the way down. Using the kinematic equation for free fall, they can calculate the building height based on the time of fall and the height of the window.

PREREQUISITES
  • Understanding of kinematic equations, specifically for free fall.
  • Knowledge of time of flight calculations in physics.
  • Familiarity with basic measurement techniques in experimental physics.
  • Ability to neglect air resistance in calculations.
NEXT STEPS
  • Study the kinematic equation: \( h = \frac{1}{2} g t^2 \) for free fall.
  • Learn how to calculate the total time of flight for objects in free fall.
  • Explore the effects of air resistance on falling objects.
  • Practice solving problems involving multiple stages of motion, such as bouncing.
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in applying kinematic equations to real-world scenarios, particularly in experimental settings.

Mathewpaasch
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Homework Statement


Kelsi and Sara are going to determine the height of tall building. Kelsi went to third floor hallway and measured the height of the window there to be 4.0 ft. Sara will drop a supper ball from the top of the building such that it will pass by the window. Kelsi starts a chronometer when she sees the ball at top of the window, reads the time as the ball passes the bottom of window. She reads 0.125s for this event, and does not stop the timer. The timer continues to run while the ball hits the side walk, bounces back and passes by the window again. Kelsi stops the chronometer as soon as she sees the ball arriving at bottom of the window. The timer reads 1.125 seconds.

Homework Equations



Neglecting the air resistance, what do they calculate for the building height?


The Attempt at a Solution


not sure where to start
 
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