" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
F1 = 12 N
F2 = 10 N
R = 2√31
ditanyakan :
α = ?
jawab :
R² = F1²+F2² + 2F1 F2 cos α
(2√31)² = 12²+10²+2(12)(10) cos α
124 = 144 +100 + 240 cos α
124 - 244 = 240 cos α
-120 = 240 cos α
cos α = -1/2
cos α = cos 120
α = 120