ROTATIONAL MOTION

What is the unit of the reactions R₁ and R₂ in Example 6.8?

• kg
• J
• m/s²
• N (newtons)

In translational equilibrium, what must be true about vertical forces?

• All forces are zero
• Upward forces are greater
• Sum of upward forces equals sum of downward forces
• Forces cancel only horizontally

Why is the weight of the rod not included in the moment equation about G?

• It is too small
• It acts horizontally
• It is balanced by the floor
• Its line of action passes through G, so moment arm is zero

What would happen to the reactions if the suspended load were moved closer to K₂?

• Both reactions remain equal
• R₁ increases
• R₂ would increase and R₁ would decrease
• Both reactions become zero

Why is the moment of W₁ taken as positive in the rotational equilibrium equation?

• Because it is a large force
• Because it acts downward
• Because it is close to K₁
• Because it produces an anticlockwise rotation about G