'forces in two dimensions' problem

AI Thread Summary
The discussion revolves around a physics problem involving a force of 54.6 N at a direction of 223 degrees. The user initially struggled to find equivalent forces using trigonometric methods and expressed confusion over the results. A suggestion was made to draw a diagram to clarify the problem, leading to the realization that the user had already identified the correct answer independently. Additionally, the user inquired about whether to continue studying calculus or electricity, or both simultaneously. The conversation emphasizes the importance of visual aids in solving physics problems and encourages self-discovery in learning.
ilanmichaeli
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Homework Statement


hello guys, that's the problem, when i tried to solve it using soh cah toh and Pythagoras law it resulted in answers e' and f', which make sense to me because both result it 54.6N and both relevant in directions so i am a bit confused.[/B]
Suppose that a force with a magnitude of 54.6 N is exerted at a direction of 223 degrees (expressed as a counter-clockwise angle of rotation from due east). This force would be the same as having two forces which are exerted at____ and_____
a. 129.2 N west, 74.6 N south
b. 27.3 N west, 27.3 N south
c. 207.3 N west, 82.3 N south
d. 82.3 N west, 207.3 N south
e. 39.9 N west, 37.2 N south
f. 37.2 N west, 39.9 N south
g. 2.9 N west, 54.5 N south
h. 54.5 N west, 2.9 N south
i. 129.2 N west, 181.8 N south
j. 181.8 N west, 129.2N south
k. ... nonsense! It would be impossible to replace a single force by two different forces.
1. ... none of these answers are even close. Yet it would be possible to find two forces.

Homework Equations


6d6f8ee8a6f578fa5be1047728034ea9.png

soh cah toa[/B]

The Attempt at a Solution



i'll be very grateful if someone could help me in another subject please - i am just about to cover all mechanics subjects and i wonder what would be more reasonable, to continue with calculus or electricity, or both simultaneously

thanks![/B]
 
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If you make a drawing, it's easy to see which is the right answer.
 
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BvU said:
If you make a drawing, it's easy to see which is the right answer.
thanks, i feel stupid.. well i didn't make it before because i thought they ask for two answers.. :(
 
I didn't give you the answer, you found it yourself and hopefully gained something in understanding (and skill set), so : well done !
 
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Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
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