Rotational Motion

The number of complete revolutions per second is:

• frequency

• period

• torque

• rotational inertia

The time required for one complete revolution is:

• torque

• frequency

• period

• rotational kinetic energy

Which has more rotational inertia? (consider all objects have equal radius)

• Hollow sphere
• solid sphere
• disk
• cylinder

Which has greater linear speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

• the inside horse
• the outside horse
• Neither

Which travels faster?

• A rotating ball
• a non rotating ball
• a honey badger

Tags

NGSS.MS-PS3-1

A small mass is rotating without friction in a circle. The string is shortened by pulling it through the axis of rotation with no external torque. What happens to the tangential velocity?

• It increases
• It decreases
• It stays the same

Suppose you are rotating in a chair with 2 equal masses held in each outstretched hand and you drop them. What happens to your angular velocity?

• Increase
• Decrease
• Stays the same
• Is lost

Tags

NGSS.HS-PS2-2

The velocity of centre of mass of the system remains constant, if the total external force acting on the system is

• minimum

• maximum

• unity

• zero

Tags

NGSS.HS-PS2-2

Analogue of mass in rotational motion is

• moment of inertia

• radius of gyration

• torque

• angular momentum

Moment of inertia of a body depends on

• mass of the body

• axis of rotation of the body

• shape and size of the body

• all of these