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April 25, 2014

April 25, 2014

Posted by **Kiley** on Tuesday, November 4, 2008 at 9:01pm.

Three forces act on a point concurrently. Force a is 80N at 220 degrees, force b is 70N at 90 degrees, and force c is 70N at 0 degrees. Find the resultant force and equilibrant force.

Please help in anyway, I really do not understand any of this.

- PHYSICS. HELP! -
**Damon**, Tuesday, November 4, 2008 at 9:32pmx components:

80 cos 220 = -61.3

70 cos 90 = 0

70 cos 0 = 70

total x = 8.72

y components

80 sin 220 = -51.4

70 sin 90 = 70

70 sin 0 = 0

total y = 18.6

so magnitude resultant = sqrt (18.6^2 +8.72^2) = 20.2 Newtons

direction

cos angle = 8.72/20.2

angle = 64.4 degrees

The equilibrant is equal in magnitude and at 64.4+180 = 244.4 degrees

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