Rotational Motion

 2600 rev/min is equivalent to which of the following?

• 2600 rad/s 
• 43.3 rad/s 
• 273 rad/s
• 60 rad/s

Tags

CCSS.HSF.TF.A.1

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
• 1.6 rad/s/s

Tags

NGSS.HS-PS2-1

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

When the clock reads 1:45 p.m., what is the rotational position of the minute hand in radians, as measured from a 12:00 reference line?

• π/4
• π/2
• π
• –π/4

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

• Near the hinges
• In the middle of the door
• At the edge of the door far from the hinges
• At the top of the door

Tags

NGSS.HS-PS2-1

What is the Unit for Torque

• Nm
• N
• W
• J

A 800N man is playing on a seesaw with son who has a weight of 200N. If the child is sitting 3 meters away, how far will the man have to sit to balance the seesaw?

• 0.75m
• 3m
• 1.5m
• 1m

Tags

NGSS.MS-PS2-2

A state of equilibrium is also seen below. Each of the cars weighs the same 9800 N. Despite the fact that there is only one car on the left-hand side that is 9 m from the fulcrum, the torques balance because, the cars on the right-hand side, are ____meters from the fulcrum.

• 4.5 m

• 3 m

• 1 m

• 2 m

What is the weight of the package?

• 5 N
• 10 N
• 15 N
• 20 N

Tags

NGSS.HS-PS2-1

The moment of inertia:

• is synonymous with mass
• does not depend on where the mass is located
• resistance to a change in rotational inertia
• more resistance to change = less inertia