Just tell me if this is even possible

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SUMMARY

This discussion confirms that it is indeed possible to calculate the time it takes for a tennis ball to hit the ground and its final speed, given the initial speed and the height of the building. The key to solving this problem lies in applying the kinematic motion equations for constant acceleration, specifically using the acceleration due to gravity, which is -9.8 m/s². The initial speed provided by the thrower is essential for determining both the time of flight and the final velocity upon impact.

PREREQUISITES
  • Kinematic motion equations for constant acceleration
  • Understanding of gravitational acceleration (-9.8 m/s²)
  • Basic algebra for solving equations
  • Concept of initial velocity in projectile motion
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  • Study the kinematic equations in detail, focusing on their applications in projectile motion
  • Learn how to derive time of flight and final velocity from initial conditions
  • Explore real-world applications of kinematic equations in sports physics
  • Investigate the effects of air resistance on projectile motion
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Students studying physics, educators teaching mechanics, and anyone interested in understanding the principles of motion under gravity.

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Homework Statement



Let's say that my friend throws a tennis ball down a building.

is it possible for me to find the time at which it hits the floor and at what speed it it is when it hits the floor. If he only tells me the initial speed and length of the building?



2. The attempt at a solution

(according to my thoughts, it seems impossible unless he tells me the time interval or the final speed, idk am i suppose to use the -9.8 acceleration for something?)
 
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yes, it is possible. You need the kinematic motion equations for constant acceleration. In this problem, once the ball leaves the thrower's hand, at an initial speed, the ball is now subject only to the force of gravity, thus, it's acceleration must be ____?____.
 
PhanthomJay said:
yes, it is possible. You need the kinematic motion equations for constant acceleration. In this problem, once the ball leaves the thrower's hand, at an initial speed, the ball is now subject only to the force of gravity, thus, it's acceleration must be ____?____.

9.8 m/s^2



Thanks a lot for the reply .
 
Last edited:

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