torque angular momentum

A turntable of mass 5.00 kg has a radius of 0.100 m and spins with a frequency of 0.550 rev/s. What is the angular momentum? Assume the turntable is a uniform disk.

• 0.0864 kg⋅m²/s

• 0.173 kg⋅m²/s

• 0.864 kg⋅m²/s

• 0.275 kg⋅m²/s

A beam is supported with a pin or a pivot on one end. What happens to the beam when a force is applied to it as shown?

• It will move down.

• It will rotate.

• It will fall.

• No effect.

The rotational effect of force is called

• rotational inertia

• rotational dynamics

• torque

• angular force

Which arrangement has the greatest torque?

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Which arrangement has the greatest torque?

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The distance between the force and the pivot is called

• moment arm

• displacement

• length

• radius

Which ARE true about torque?

• It is the dot product of force and moment arm.

• Its unit is Newton-meter.

• It is a vector quantity.

Torque is the cross product of the force and the moment arm. Cross product means...

• Force and moment arm are parallel to each other.

• Force and moment arm are perpendicular to each other.

• Force and moment arm are anti-parallel to each other.

• Force and moment arm are at angle to each other.

What is the magnitude and direction of the torque caused by the force at pivot O?

• 16 N·m, Clockwise

• O N·m

• 16 N·m, Counterclockwise

• 16 N·m, upward

What is the magnitude and direction of the torque caused by the force at pivot O?

• 14 N·m, counterclockwise

• 8 N·m, counterclockwise

• 14 N·m, clockwise

• 8 N·m, clockwise