How Do You Calculate Acceleration and Ground Component on an Inclined Ramp?

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Homework Help Overview

The problem involves a skateboarder rolling down a ramp, requiring the calculation of her acceleration and the component of that acceleration parallel to the ground. The scenario is set in the context of kinematics, particularly focusing on motion along an inclined plane.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to apply kinematic equations but expresses confusion regarding the setup and calculations. Some participants question the accuracy of the original poster's approach and suggest verifying significant figures. Others offer to guide through the first part of the problem while encouraging independent thought for subsequent steps.

Discussion Status

The discussion is active, with participants exploring different interpretations of the problem. Some guidance has been offered regarding the use of kinematic equations, but there is no explicit consensus on the correct approach or solution at this stage.

Contextual Notes

The original poster mentions using an online platform that provides feedback on answers, indicating a potential constraint in how they approach the problem. There is also a reference to significant figures, which may affect the calculations being discussed.

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Homework Statement



A skateboarder, starting from rest, rolls down a 15.0 m ramp. When she arrives at the bottom of the ramp her speed is 7.95 m/s.

(a) Determine the magnitude of her acceleration, assumed to be constant.

(b) If the ramp is inclined at 23.0° with respect to the ground, what is the component of her acceleration that is parallel to the ground?

Homework Equations



v squared=v initial squared +2ax
kinematics equations..

The Attempt at a Solution



I tried so many times to get the answer! I tried making a right triangle with 23 degree angle and cos 23=x/2.1, it didnt work out...i'm so confused, please help!
 
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Seems OK to me. How do you know it's wrong? Did you use enough significant figures?
 
I don't know, that's probably it though! I'm using webassign and it tells u if its wrong or not
 
What did you enter exactly?
 
Yeah, that's it. Haha, dumb Webassign! That was the first answer I put in too.
Thanks so much =)
 
Beginning the way DocAl begins it is fairly a easy question.
I can help you in the first part,
use the equation v^2=u^2+2as
all the data is given in the quation and after getting this part i would prefer that you think about it.
 

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