Question

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.

Answer 1

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

Answer 2

Oh ok I got 283 and 75 degreed from usng the Rx an Ry equations and then doing tan^-1(Ry/Rx), so 283 and 75 is my answer?