Find the angle to the horizonal using the given information.

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SUMMARY

The discussion centers on calculating the angle at which a man pulls a wooden crate across a floor using a force of 65N and an acceleration of 20 m/s². The crate has a mass of 15 kg. Participants emphasize the importance of using Newton's second law, F=ma, to resolve the force into horizontal and vertical components rather than relying on work or velocity equations. The key takeaway is to focus on mass and acceleration for solving the problem effectively.

PREREQUISITES
  • Understanding of Newton's second law (F=ma)
  • Basic knowledge of force components in physics
  • Familiarity with mass and acceleration concepts
  • Ability to manipulate trigonometric functions for angle calculations
NEXT STEPS
  • Study how to resolve forces into horizontal and vertical components
  • Learn about trigonometric functions and their applications in physics
  • Explore additional problems involving mass and acceleration
  • Review the concepts of energy and work in physics
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This discussion is beneficial for physics students, educators, and anyone looking to deepen their understanding of force dynamics and problem-solving techniques in mechanics.

paroxism--now
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Homework Statement


A man pulls a wooden crate across a floor by a rope.
Mass of the crate = 15Kg
Force the man pulls with = 65N
Acceleration of the box = 20 M/s²

What is the angle to the horizontal at which the man pulls the rope.


Homework Equations



W = Fa Δd cosΘ
W = ½mv²
(think)


The Attempt at a Solution



I clearly don't understand this, but at first I figured I would use W = Fa Δd cosΘ and just rearrange the equation, then I realized, I don't have Work, figured I would find that using
W = ½mv². Then I realized I don't have Velocity, I can't find velocity without distance and I can't find distance without time.
I'm lost.
 
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Don't use work, and don't use velocity. Use mass and acceleration. Use F=ma. Split F into horizontal and vertical components.
 
Dick said:
Don't use work, and don't use velocity. Use mass and acceleration. Use F=ma. Split F into horizontal and vertical components.
Bah! I feel so silly, this whole unit is on energy and work I became a little closed minded and forgot there were other formulas I could use.
Thank you !
=)
 

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