Sebuah almari di kenai 3 gaya dengan arah seperti gambar.tentukan besar dan arah resultan ketiga gaya tersebut
Jawaban:
x1 = 3 cos 60 y1 = 3 sin 60
x1 = 3 x 1/2 y1 = 3 x 1/2 √3
x1 = 3/2 y1 = 3/2√3
x2 = 0 y2 = 6 sin 90
y2 = 6 x 1
y2 = 6
x3 = 6 cos 60 y3 = -6 sin 60
x3 = 6 x 1/2 y3 = -6 x 1/2√3
x3 = 3 y3 = -3√3
Rx = 3/2 + 3 Ry = 3/2√3 + 6 -3√3
Rx = 9/2 Ry = 6 – 3/2√3
R total = √9/2^2 + 6 – 3/2√3^2
R total = 3√7 – (2√3)