Torque and Moment of Inertia

Which will produce more torque to loosen the lug nut?

• A

• B

• They are the same

Which of the pistons in the image produces more torque?

• Short Stroke

• Long Stroke

• Square

• They are al the same torque

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Why are these soldiers using a cheater pipe/bar?

• It increases the torque by increasing the radius.

• It decreases the torque by increasing the radius.

• It increases the torque by decreasing the radius.

• It's fun and cool to cheat.

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NGSS.MS-PS2-2

A helicopter uses it tail rotor to compensate for _______.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Without a tail rotor, a helicopter would start

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NGSS.HS-PS2-1

Which has the greater angular velocity?

• A

• B

Suppose you are designing an engineless car for a downhill coasting race.  What type of wheels would be the best?

• Solid disks.

• Hoops.

• Hollow cylinders.

• Diamond encrusted triangles.

Place the Rotational Inertia (I) of each shape from smallest to largest.

Assume same M and R

• Solid cylinder

• 4

• Cylindrical shell

• 3

• Solid Sphere

• 1

• Spherical Shell

• 2

A gymnast tucks her head and knees when starting a flip. It

• Increases her linear velocity

• Decreases her angular velocity

• Increases her moment of inertia

• Decreases her moment of inertia

What happens to her angular velocity when a figure skater brings in her arms?

• Increases her angular velocity

• Decreases her angular velocity

• Has no affect