Question

Determinar a magnitude da força F=F1+F2, sendo F1=10i +20j e F2=20i +20j

Answer 1

F1 = 10i + 20j ; F2 = 20i + 20j 
F1+ F2 = (10i + 20i) + (20j + 20j)
F = 30i + 40j
lFl² = 30² + 40²
lFl² = 900 + 1400
lFl² = 2500
lFl = √2500
lFl = 50