Physics chapter 10 Circular Motion

What are two types of circular motion?

• speed and distance
• centripetal and centrifugal
• force and motion
• rotation and revolution

the straight line around which rotation takes place

• axis
• revolution
• allies
• rotation

motion of an object turning about an internal axis (within the body of an object); also called spin

• rotation
• revolution

When an ice skater does a pirouette turn in her routine at the Olympics, she _______ about her axis.

• rotates
• revolves

motion of an object turning around an axis outside the object (external axis)

• rotation
• revolution

As the earth travels around the sun once per year it is _____.

• rotating
• revolving

A rotation takes place about an axis that is _____ but a revolution takes place about an axis that is _____.

• external; internal
• internal; external

the speed of an object moving along a circular path

• revolutions
• linear or tangential speed
• rotational speed

Horses that move with the fastest linear speed on a merry-go-round are located _____.

• near the middle
• near the inside
• near the outside
• in the center

If the needle of a record player is moved to a point TWICE as far from the center, its linear speed _____.

• gets cut in half
• doubles
• stays the same
• decreases