How Do You Calculate the Initial Velocity of a Juggling Ball?

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Homework Help Overview

The discussion revolves around calculating the initial velocity of a juggling ball thrown between level hands, with specific parameters provided, including the distance between hands and the time the ball is in the air.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss starting points for the problem, including the importance of identifying given information and required outcomes. Some express uncertainty about how to proceed after sketching the scenario.

Discussion Status

There is ongoing exploration of the problem, with participants sharing initial thoughts and hints. Guidance has been offered regarding the use of kinematics equations and the significance of displacement in the context of the problem.

Contextual Notes

Participants are working within the constraints of a homework assignment, which may limit the information they can share or the methods they can use. There is an emphasis on understanding the setup and relevant equations without providing direct solutions.

c.kal
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You are practicing your juggling skills by throwing a single juggling ball back and forth between level hands. The distance between your hands is 40 cm. Between catches, the ball is in the air 0.85 s. Calculate the magnitude and direction of initial velocity of the juggling ball each time you throw it.

i'm not sure where to start on this one..
 
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Hi c.kal, I see you are new here. http://imageshack.com/a/img515/4884/welcomesign.gif

You start this problem the same way as you start any physics problem---you write down what you are given and what you are required to find. This includes a sketch because things are clearer if you have some pictorial aid to focus on. Then you write down as many relevant equations as you can. Next, cross out those equations that you can see are of no use here.

Then, you get serious ... :smile:
 
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I sketched and labeled it but I still can't figure out where to start
 
Post what you've done here. Show the kinematics equations that might be useful.

Hint: when a ball thrown into the air returns to the level it was thrown from, its displacement at that point equals zero.
 

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