Rotational Motion 8.1-8.4

Multiple Choice

A ladybug sits halfway between the rotational axis and the outer edge of the turntable. When the turntable has a rotational speed of 20 RPM and the bug has a tangential speed of 2 cm/s, what will be the rotational and tangential speeds of her friend who sits at the outer edge?

• 1 cm/s

• 2 cm/s

• 4 cm/s

• 8 cm/s

Multiple Choice

A hoop and a disk are released from the top of an incline at the same time. Which one will reach the bottom first?

• Hoop

• Disk

• Both together

• Not enough information

Multiple Choice

Suppose the girl on the left suddenly is handed a bag of apples weighing 50 N. Where should she sit in order to maintain balance, assuming the boy does not move?

• 1 m from pivot

• 1.5 m from pivot

• 2 m from pivot

• 2.5 m from pivot