Rotational Kinematics & Uniform Circular Motion Conceptual

Are astronauts really weightless?

• Yes; they have no weight in space

• Yes; they are in space where there is no gravity

• No; they are in a constant state of free fall rotating around the Earth

• No; the moon pulls on them with its gravity making them appear weightless

The "centrifugal force" describes what actual physics phenomena?

• Mass

• Weight

• Rotational motion

• Inertia

What does the term "centripetal" mean?

• Center fleeing

• Center seeking

• Rotation

• Circular

Centripetal force can also be what other forces? Select two.

• Weight

• Friction

• Tension

• Air Resistance

Why do the clothes in a washing machine fling outward along the edge of the drum?

• Centripetal force isn't enough to pull them into the center of the drum, so the clothes are flung outward toward the edge of the drum

• Centripetal force is enough to pull them into the center of the drum, pushing them outward to the edge of the drum

• Gravity pulls the clothes to the outside of the drum

When driving your car around a curve, why do you lean the opposite the direction of the turn?

• Gravity

• Inertia

• Weight

• Centripetal Force

A top completes 200 revolutions around. How would you convert that radians?

• Divide by 2π

• Multiply by 2π

• Divide by π

• Multiply by π

What does the term "tangential" mean?

• Moving forward

• Moving in a circle

• Moving in a straight line

• Moving around

In uniform circular motion, there is a

• Constant velocity

• Constant angular velocity

• Zero acceleration

• Net tangential acceleration

If the centripetal force on a particle in uniform circular motion is increased,

• The tangential speed remains constant

• The tangential speed will decrease

• The radius of the circular path will increase

• The tangential speed will increase and/or the radius will decrease