Ch.5 Uniform Circular Motion

What is the name of the acceleration that occurs when an object moves in a circle?

• Centripetal acceleration

• Centrifugal acceleration

• Linear acceleration

• Tangential acceleration

What is the direction of the velocity of an object moving in a circle?

• Along the path of the circle

• Perpendicular to the radius of the circle (tangent)

• Opposite to the centripetal force

• Toward the center of the circle

What happens to the velocity of an object moving in a circle if there is no force to turn it?

• It continues moving in a straight line

• It slows down and stops

• It changes direction and moves outward

• It changes direction and moves inward

What is the force that causes an object to move in a circle called?

• Centripetal force

• Centrifugal force

• Inertial force

• Frictional force

What is the period of motion?

• The time it takes for an object to complete one revolution

• The distance an object travels in one second

• The speed of an object moving in a circle

• The force exerted on an object moving in a circle

What is the frequency of motion? (more of this in ch.7/8)

• The number of revolutions an object makes in one second

• The time it takes for an object to complete one revolution

• The speed of an object moving in a circle

• The force exerted on an object moving in a circle

How can the "speed" of an object in uniform circular motion be calculated?

• Circumference divided by Period

• Change in position divided by change in time

• Change in velocity divided by change in time

• Change in acceleration divided by change in time

What is the equation for the magnitude of centripetal acceleration?

• Speed divided by radius

• Radius divided by speed

• Speed squared divided by radius

• Radius squared divided by speed

What happens to the centripetal acceleration if the speed along the circular path increases?

• It decreases

• It remains the same

• It increases

• It becomes zero

If the variable z is measured as we change the size of the circle (diameter or circumference); Then determine the ideal responding variable (variable z) for Uniform Circular Motion.