AP Physics Rotational Kinematics

A kg-m²/s² is otherwise known as a(n)

• Newton

• Joule

• Watt

• Displacement

Tags

NGSS.HS-PS2-1

A merry go round starts from rest, and reaches an angular speed of 2 radians/second in 3 seconds. What is its angular acceleration, and through what angle does it sweep in the 3 second time interval? 

• α = 3/2 rad/s²,   θ=27/4 rad

• α = 2/3 rad/s², θ=3 rad

• α = 2/3 rad/s², θ=6 rad

• α = 6 rad/s², θ=27 rad

• - 8 rad/s²
• + 8 rad/s²
• -100 rad/s²
• -20 rad/s²

• - 100 rad
• -100π rad
• -40π rad
• -200π radians

• Clockwise and speeding up
• Counterclockwise and speeding up
• Clockwise and Slowing down
• Counterclockwise and slowing down

Two bugs ride a turntable which is rotating at a constant rate of 4 rad/s. Bug A is at a radius of 4 cm, while bug B is at a radius of 8 cm. What is the velocity of bug B?  

• 4 cm/s

• 32 cm/s

• 2 cm/s

• 1 cm/s

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 fan spins with a constant angular speed of 500 radians/second. How long will it take to cover an angle of 2π radians (one revolution)?

• 0.013 s

• 0.002 s

• 76.9 s

• 6.28 s

SI unit of acceleration is-

• ms^-1

• ms^-2

• ms²

• none of these

Tags

NGSS.HS-PS2-1