Rotational Motion of a Rigid Body

In one revolution there are?

• I radian

• 2π radian

• 2 radian

• 4 radian

The easiest way to open a heavy door is by applying the force

• Near the hinges

• In the middle of the door.

• At the top of the door.

• At the edge of the door far from the hinges.

Tags

NGSS.HS-PS2-1

The total angular momentum of a rotating body remains constant if the net torque acting on it is zero

• Frequency.

• Rotational kinetic energy.

• Rotational motion.

• Law of conservation of angular momentum.

A quantity that measures the ability of a force to rotate an object  around some axis

• linear speed
• angular speed
• torque
• centrifugal speed

A person sits on a freely spinning lab stool that has no friction in its axle. When this person extends her arms,

• her moment of inertia increases and her angular speed decreases.
• her moment of inertia decreases and her angular speed increases.
• her moment of inertia increases and her angular speed increases.
• her moment of inertia increases and her angular speed remains the same.

What does this formula measure?

• moment of inertia
• impulse
• electric current
• angular momentum

Analogue of mass in rotational motion is

• moment of inertia

• radius of gyration

• torque

• angular momentum

The number of complete revolutions per second is:

• frequency

• period

• torque

• rotational inertia

Tags

NGSS.HS-PS4-1

If a system is in static equilibrium, it must have the following 2 conditions:

• ∑τ=0

• Constant acceleration

• ∑F=0

• Positive forces only

Inertia is a force

• True

• False

Tags

NGSS.HS-PS2-1