ROTATIONAL MOTION

What is the significance of the vertical line AA₁ in Fig. 6.25?

• It measures the height
• It shows air resistance
• It indicates magnetic field
• It shows the line of action of tension and gravity

How is weight different from mass in Example 6.8?

• They are the same
• Mass depends on gravity
• Weight is in kg
• Weight is force (N), mass is amount of matter (kg)

What would be the reaction if the load were at the centre of the rod?

• R₁ would be zero
• R₂ would be zero
• Both reactions would be equal
• Both would be 98 N

Why are both translational and rotational equilibrium needed?

• One is sufficient
• To increase complexity
• To measure mass
• To fully prevent motion of a rigid body

What is the role of the suspended load in the moment equation of Example 6.8?

• It creates a clockwise moment
• It has no moment
• It balances R₁ directly
• It creates an anticlockwise moment about G