Answer:
(a) The resultant force is 26.46 N
(b) upward forces = downward forces = 30 N
Explanation:
Given;
two forces, 20 N and 10 N
angle between the forces, θ = 120°
(a)
The resultant force is given by cosine rule;
R² = 20² + 10² - 2(20 x 10)Cos120
R² = 500 - (-200)
R² = 500 + 200
R² = 700
R = √700
R = 26.46 N
(b)
sum of the upward forces = sum of the downward forces
[tex]F_u_p = F_d_o_w_n\\\\F_u_p = 20 + 10\\\\F_u_p =30 \ N[/tex]
downward forces = 30 N
