Rotational Equilibrium

A 0.12-m-radius grinding wheel takes 5.5 s to speed up from 2.0 rad/s to 11.0 rad/s. What is the wheel's average angular acceleration?

• 9.6 rad/s/s
• 4.8 rad/s/s
• 3.1 rad/s/s
• 10.6 rad/s/s

A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed?

• 3.2 rad/s
• 26 rad/s
• 52 rad/s
• 81 rad/s

Tags

CCSS.HSF.TF.A.1

Which represents the acceleration of the ball?

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1

What is the weight of the package?

• 5 N
• 10 N
• 15 N
• 20 N

Tags

NGSS.HS-PS2-1

why is the car on the left unstable?

• Its centre of mass is high
• it has a narrow base
• it has a high height
• all of the above

this cupboard is filled with boxes. will it topple over ?

• it will
• it will not
• it will if the weight remains inside the base

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Signs are suspended from rods of equal length on the side of a building. For each case, the mass of the rod can be ignored. The mass of the sign is given in each figure. Which case has the greatest magnitude of the torque that the sign exerts about the point at which the rod is attached to the side of the building.

• 
• 
• 
• 

A line on which the centers of circles lie is:

• lever arm

• angular momentum

• period

• axis of rotation

What is defined as the rate of change of angular position?

• angular acceleration

• angular velocity

• angular momentum

• rotational kinetic energy

Which one is a vector quantity?

• energy

• torque

• both of these

• none of these

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-4

NGSS.HS-PS3-5