Homework Help: Physics(Please just check, thanks)

Posted by Hannah on Monday, September 24, 2012 at 10:42pm.

Using a force table the direction and magnitude had to be found for the following measurements:

F1 = 200 grams at 30 degrees; F2 = 200 grams at 120 degrees

The magnitude and direction found was 280 grams at 257 degrees.

Using the magnitude and direction of F1 and F2 I need to find out the magnitude and direction of the resultant vector F1-F2.

I am not sure how to do this. Thank you for you help.

Physics(Please help, thank you) - Scott, Monday, September 24, 2012 at 2:49pm
the force that was needed to balance out F1 and F2 is equal in magnitude to the resultant, but opposite in direction

so the resultant would be 280g at 77º

since F1 and F2 have equal magnitudes and are 90º apart; the expected resultant would be 283g at 75º __ so your outcome looks good

So just to make sure, is the 280 grams at 77 degrees that I obtained from the turn table the answer to the question or is it 283 grams at 75 degrees obtained when Using the Rx and Ry equations?

Physics(Please just check, thanks) - Hannah, Tuesday, September 25, 2012 at 12:28am
Please diregard. Thank you!

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