What is the average launch speed?

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Homework Help Overview

The problem involves calculating the average launch speed of a basketball launched horizontally from a diving board, with specific details about the height and horizontal distance covered. The context is rooted in kinematics, particularly focusing on the relationship between vertical and horizontal motion.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the need to calculate time based on vertical motion, questioning how to derive it without an initial vertical velocity. There is an exploration of relevant equations and their applicability to the problem.

Discussion Status

The discussion is ongoing, with participants offering thoughts on how to approach the calculation of time and the implications of launching the basketball horizontally. Some guidance has been provided regarding focusing on vertical motion, but no consensus has been reached on the method to proceed.

Contextual Notes

Participants note the absence of initial velocity and the challenge of calculating time based on the given parameters. The discussion reflects uncertainty about how to utilize the equations effectively given the constraints of the problem.

Angela_vaal
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Homework Statement


During several practice runs you stand at the end of a diving board and launch the basketball horizontally from a position 4.50 m above the water. If the average landing spot is6.25 m horizontally from your initial position, what is the average launch speed?

Homework Equations

The Attempt at a Solution


avg speed=total distance/total time. but time is not stated? where do i start ?! i attached the photo of the problem
 

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Angela_vaal said:
where do i start ?
By thinking about the vertical motion. What do you know about the vertical components of initial and final speeds, time, distance and acceleration? From the items you know, what else can you calculate?
 
haruspex said:
By thinking about the vertical motion. What do you know about the vertical components of initial and final speeds, time, distance and acceleration? From the items you know, what else can you calculate?

would I calculate time using the formula y=y1+v1t-(1/2)gt^2?
 
Angela_vaal said:
would I calculate time using the formula y=y1+v1t-(1/2)gt^2?
What do you think?
 
haruspex said:
What do you think?
I'm thinking I have to calculate time somehow to get the average speed. But if i use this equation, I'm not sure how I will use this equation if I don't have the initial velocity.
 
Angela_vaal said:
I don't have the initial velocity.
You just need the initial vertical component of velocity:
Angela_vaal said:
launch the basketball horizontally
 

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