Question

An object is in equilibrium under four concurrent forces in the direction shown in figure. The magnitude of and $\overrightarrow { \mathrm { F } } _ { 2 }$are–

• A. Zero; $4 \sqrt { 3 }$N
• B. $4 \sqrt { 3 }$N; zero
• C. $4 \sqrt { 3 }$N; $4 \sqrt { 3 }$N
• D. Zero, zero

Answer 1

Answer: (A)

Zero; $4 \sqrt { 3 }$N

Answer 2

X-direction F₂ cos 30⁰ = 4 + 4 cos 60 ....(1)

Y-direction F₁ + 4cos 30⁰ = F₂ sin 30⁰ ...(2)