ROTATIONAL MOTION

How is the centre of gravity determined for an irregular cardboard?

• By measuring its thickness
• By weighing each corner
• By balancing it on a finger
• By suspending it from different points and marking vertical lines

What is the unit of weight used in Example 6.8 after multiplying mass by g?

• kg
• J
• N
• m/s

What is the moment arm of the suspended load about G in Example 6.8?

• 5 cm
• 10 cm
• 25 cm
• 30 cm

What causes the moment of force R₁ to be anticlockwise in Example 6.8?

• It is the first support
• It is larger in magnitude
• It acts upward
• Its position relative to G produces rotation in the anticlockwise direction

For rotational equilibrium in Example 6.8, about which point are moments taken?

• A
• B
• G
• P