Exploring Radians and Arc Length in Rotational Kinematics

What direction does the velocity vector point in circular motion?

• Towards the center of the circle

• Away from the circle

• Tangent to the circle

• In the direction of acceleration

What happens to the velocity vector even if the speed is constant in circular motion?

• It decreases over time

• It points towards the center

• It changes direction

• It remains constant

What are the two components of motion in circular motion?

• Linear and angular

• Horizontal and vertical

• Radial and tangential

• Forward and backward

What unit is commonly used to measure angles in circular motion?

• Cycles

• Degrees

• Radians

• Gradients

How is a radian defined?

• The circumference divided by the diameter

• The arc length divided by the radius

• The diameter divided by the circumference

• The radius divided by the arc length

How many radians are in a full cycle around a circle?

• 2 Pi radians

• Pi radians

• 360 radians

• 180 radians

What is the radian measure of a 90-degree angle?

• Pi radians

• 2 Pi radians

• Pi/2 radians

• Pi/4 radians

How do you convert 66 degrees to radians?

• 180/Pi * 66

• 66 * Pi/180

• 66 * 180/Pi

• 66/Pi

What is the arc length if the radius is 60m and the angle is Pi/2 radians?

• 30m

• 60m

• 90m

• 120m

How many radians does an 11 full cycle ferris wheel ride cover?

• 360 degrees

• 22 Pi radians

• 11 Pi radians

• 69.1 radians