04c - Angular Velocity and Acceleration

When an object spins it is said to undergo ______________. 

• rotational motion
• angular momentum
• axis differentiation
• rotational axis

Two children, Jack and Jill, ride on a merry-go-round. Jack is at a greater distance from the axis of rotation than Jill. Which of the following are true statements?

• Jill and Jack have the same tangential speed.

• Jack has a greater tangential speed than Jill.

• Jill has a greater angular speed than Jack.

• Jill has a smaller angular speed than Jack.

Which of the following is NOT a unit of rotational speed?

• Meters per second

• Revolutions per minute

• Revolutions per second

• Rotations per second

The linear speed of an object directed along the tangent to the object’s circular path.

• centrifugal speed
• tangential speed
• linear speed
• angular speed

Which has greater angular speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

• The inside horse
• The outside horse
• Neither - they both have the same angular speed

A bug on a turning phonograph record will make more turns per minute if it is located toward the center of the record.

• True
• False

Tags

CCSS.8.EE.C.7B

Which has greater linear speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

• the inside horse
• the outside horse
• Neither

Stars originate as large bodies of slowly rotating gas.  Because of gravity, these clumps of gas slowly decrease in size.  What happens to the angular speed of the start as it shrinks?

• It rotates faster.
• It rotates slower.
• It starts to accelerate in the forward direction.
• The rotation rate stays the same.

Which of these has the greatest centripetal acceleration?

• Large Velocity, Large Radius
• Small Velocity, Small Radius
• Large Velocity, Small Radius
• Small Velocity, Large Radius

The rotational equivalent to x (displacement), v (velocity) and a (acceleration) are?

• m, m/s, m/s²

• θ, ω, α

• x, x/t, α

• μ, Σ, τ