Calculate velocity when time is equal

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Homework Help Overview

The discussion revolves around a projectile motion problem where a ball is thrown towards an object located 12 meters away and 8 meters above the initial height of the ball. Participants are exploring how to calculate the necessary velocity for the ball to hit the target, given the constraints of the problem.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the relationship between horizontal and vertical components of velocity, questioning how to derive these from the given distances. There is uncertainty about the correct angle of projection and how to proceed with the limited information provided.

Discussion Status

Some participants have provided guidance on considering the components of velocity and using kinematic equations, while others express confusion about how to find velocity without knowing time. Multiple interpretations of the problem are being explored, but there is no explicit consensus on the next steps.

Contextual Notes

Participants note the challenge of working with insufficient information, specifically the lack of time and how it affects the ability to calculate velocity. There is an acknowledgment of the need to understand projectile motion fundamentals.

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1. Ball is thrown at an object that is 12m away and 8m above the initial height of the ball. At what velocity must the ball be thrown to hit the object?
2. V=d/t
3. You can find the angle at which the ball must be thrown by using tan^-1= (8/12)= 33.69 degrees, not sure if that helps much. Vx=12m/t, vy=8m/t, so at what velocity will the time be equal? Do i have enough info...?
 
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Vx=12mxt, vy=8mxt,

v = d/t. How did you write the above equations? The angle also not correct.

It is a projectile motion.

You have to consider the components of velocity along the horizontal and vertical direction. Then use the kinematic equations for horizontal and vertical displacement.
 
yes, ok so for the horizontal velocity its velocity horizontal=displacement horizontal / time. then for velocity vertical = displacement vertical / time, what do i do next?
 
First of all go through the projectile motion from any site or textbook. Learn the basic things. Then I will help you.
 
Ok, i know the basics but i just do not know what to do with so few givens. How can i find the velocity without time and vice versa?
 

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