Rotational Motion

A beam with a length of L is lifted from one end with a force of F1.  If the beam doubles in length but contains the same mass, what will the force required to lift it be in terms of F1?

• F1
• 1/2 F1
• 2 F1
• 1/4 F1

Tags

NGSS.HS-PS2-1

A construction worker is worried about applying too much torque to a bolt using his wrench.  What could he do to reduce his torque on the bolt?

• Increase the length of the wrench
• Increase the force on wrench
• Reduce the length of the wrench
• Reduce the friction between the bolt and wrench

Tags

NGSS.HS-PS2-1

What direction is the force acting by post A?

• Up
• Down
• Neither Direction
• Depends on the mass of the diver

Tags

NGSS.HS-PS2-1

What will travel down a ramp the slowest?

• Solid Disk
• Hoop
• Sphere

Which windmill will rotate more easily?

• A
• B
• Can't Tell

Tags

NGSS.MS-PS2-2

What force is equal to the normal force from the wall acting on the ladder?

• Friction from the floor
• Normal force from the floor
• Friction from the wall
• Weight of the ladder

Tags

NGSS.HS-PS2-1

How does the angular momentum change of the clay - disk system when the clay collides and sticks to the disk?

• Increases
• Decreases
• Remains the same

A student wants to test how rotational inertia affects angular acceleration.  Which experiment would do this?

• Change the force applied and measure the new velocities
• Change the radius and measure the torque needed to accelerate it.
• Change the rotational inertia and measure the angular acceleration
• Change the mass and measure the momentum change.

The object shown is dropped from its center of mass.  Sphere m increases its momentum by 10kgm/s each second as it falls.  How much will sphere 2m increase by each second?

• 10kgm/s
• 20kgm/s
• 30kgm/s
• 40kgm/s

When the object shown is released from the center of mass, will it rotate?

• No, the force of gravity is equal on each sphere.
• No, there are equal torques on each side of the object
• Yes, the larger mass will have more gravity acting on it
• Yes, the smaller mass has less torque acting on it