A problem on velocity that is bugging me :/

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Homework Help Overview

The problem involves a skier leaving a ski jump with a specified horizontal velocity and seeks to determine the horizontal and vertical components of her velocity just before landing after a set time. The subject area relates to kinematics and projectile motion.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the forces acting on the skier in both horizontal and vertical directions and suggest using Newton's second law. Questions are raised about missing information, such as the vertical height difference and the initial vertical velocity component. There is also a focus on understanding the vertical motion independently.

Discussion Status

The discussion is ongoing, with some participants offering guidance on assumptions that could simplify the problem, such as neglecting air resistance and considering the launch as horizontal. However, there is no explicit consensus on how to proceed due to the lack of complete information.

Contextual Notes

Participants note potential missing information regarding the vertical height and initial vertical velocity, which are crucial for solving the problem. The original poster expresses uncertainty about how to advance in their solution.

warhammer
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Homework Statement



A skier leaves a ski jump with a horizontal velocity of magnitude 29.4m/s. The instant before the skier lands 3.00s later, what are magnitudes of the horizontal & vertical components of her velocity?

Homework Equations


v=[(v^2(x component)+v^2 (y-component)]^(1/2)

The Attempt at a Solution


Honestly speaking I am at a loss about how to proceed! Please help![/sub][/sub]
 
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Firstly, you must understand what forces are applied in x and y direction during the ski jump.

Then, you can use the second law of Newton for x and y direction.
 
Hello @warhammer,
Welcome to Physics Forums (PF)! :welcome:

warhammer said:

Homework Statement



A skier leaves a ski jump with a horizontal velocity of magnitude 29.4m/s. The instant before the skier lands 3.00s later, what are magnitudes of the horizontal & vertical components of her velocity?

Homework Equations


v=[(v^2(x component)+v^2 (y-component)]^(1/2)[/B]

The Attempt at a Solution


Honestly speaking I am at a loss about how to proceed! Please help![/sub][/sub]

Please post the problem verbatim as it was written. There seems to be some information missing. Is there a [vertical] height difference between the point where the skier leaves the jump and where she lands? What is her vertical velocity component when she leaves the jump?

Exactly where are you getting stuck? Please show us any work you have done so far.
 
Unless there is more information in the problem statement I would make the following assumptions:

The launch is horizontal
There is no air resistance.

The problem then appears quite straightforward. Start by thinking about the vertical motion on it's own.
 
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