ROTATIONAL MOTION

What is the total weight supported by the knife edges?

• 39.2 N
• 58.8 N
• 98.00 N
• 100 N

What is the main purpose of using knife edges in Example 6.8?

• To increase friction
• To measure weight
• To decorate the setup
• To minimize friction and provide precise support

How does the method in Fig. 6.25 work for any shaped body?

• It only works for symmetric bodies
• It depends on material
• Because gravity aligns the CG below the suspension point regardless of shape
• It requires electrical power

What is the condition for zero torque about a point?

• All forces are zero
• Forces are parallel
• Net moment of all forces about that point is zero
• The point is at the edge

Why can't a single vertical line determine the CG?

• It is inaccurate
• Because the line is curved
• Because it only gives a line of possible points
• Because gravity changes