Unit 4 Quiz 1 Review

A gear spins at a rate of 400 revolutions/minute. Which choice is closest to its angular speed in radians/second?

• 6.67 rad/s

• 2500 rad/s

• 41.9 rad/s

• 20.9 rad/s

Tags

CCSS.HSF.TF.A.1

A record spins at 33 rpm (revolutions per minute), which is an angular speed of about 3.46 radians per second. What is the approximate linear speed of a fly that sits on the record, 12 cm from the center?

• 3.4 cm/s

• 21.5 cm/s

• 41.5 cm/s

• 131.9 cm/s

Tags

CCSS.HSF.TF.A.1

A ceiling fan with 16 inch blades rotates at 45 rpm. Find the angular speed of the fan in rad/min. Round to the nearest tenth.

• 90 rad/min

• 282.7 rad/min

• 45 rad/min

• 141.4 rad/min

Tags

CCSS.HSF.TF.A.1

Determine the linear velocity of the tips of the blades in inches per minute for a ceiling fan with 20 inch blades rotating at 45 rpm.

• 5654.9 in/min
• 1800 in/min
• 2827.4 in/min
• 900 in/min

Tags

CCSS.HSG.SRT.C.8

A child sits 0.75 m from the center of a merry go round. The merry go round makes one revolutions in 4 seconds. What is the child's linear speed? (Use 3.14 as pi, and Round your answer to tenths)

• 1.9 m/s

• 1.2 m/s

• 12.6 m/s

• 4.71 m/s

Tags

CCSS.HSF.TF.A.2

• I

• II

• III

• IV

Tags

CCSS.HSF.TF.A.2

Select ALL that apply: Which of the following is a point on the unit circle?

• (1, 1)

• (-1, 0)

Tags

CCSS.HSF.TF.A.2

135°

Tags

CCSS.HSF.TF.A.2

What is cos 60°?

• ½
• ^√3/₂
• ^√2/₂
• 1

Tags

CCSS.HSF.TF.A.2