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Introductory Physics Homework Help
When should I use cosine or sine for sum of forces in the y or x direction?
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[QUOTE="DrClaude, post: 4545685, member: 461323"] One way to quickly check if you made the right choice is to think about the physics, while keeping in mind that, for angles less than 90°, the cosine is bigger for smaller angles, and the reverse is true for the sine. In the problem you have, think what happens if you reduce the angle of the ramp: the blocks will slide less, and the downward force due to the mass must increase. Therefore, for y you use the cosine of the angle, and sine for x. [/QUOTE]
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Introductory Physics Homework Help
When should I use cosine or sine for sum of forces in the y or x direction?
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