GP1_Q2_Quiz1:Equilibrium

What is happening to the ice skater?

• Decreased Angular velocity, decreased rotational inertia

• Decreased Angular velocity, increased rotational inertia

• Increased Angular velocity, increased rotational inertia

• Increased Angular velocity, decreased rotational inertia

What does Rotational Inertia depend on?

• Mass

• Mass Distribution

• Both Mass and its Distribution

• Neither Mass nor its distribution

Does this woman have a high or low rotational inertia?

• High

• Low

Angular Momentum is the product of...

• rotational inertia and linear velocity.

• linear inertia and angular velocity.

• linear momentum and angular velocity

• rotational inertia and angular velocity.

Which of these objects has the most rotational inertia?

• Left

• Middle

• Right

Which of these items is easier to turn?

• Left

• Right

• Both are just as easy to turn

What happens to rotational inertia of an object when mass is moved close to axis of rotation?

• Decreases

• Increases

• Stays the Same

Find the angular momentum for a 5 kg solid cylinder with a 20 cm radius rotating at 3 rad/s.

• 3000 kg-m²/sec

• 0,3 kg-m²/sec

• 0,6 kg-m²/sec

• 1.2 kg-m²/sec

A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?

• 7.5 Nm

• 1.5 Nm

• 750 Nm

• 150 Nm

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