Rotational Motions Calculations Follow-up Homework
You must show all work. Watch out for units. You need to convert in some instances.
1)What is the equation for tangential velocity (tangential speed)?
2)What is the tangential velocity of something with a radius of 2m and a rotational speed of 7 m/s?
3)What is the tangential velocity of something with a radius of 5.45 Km and a rotational speed of 111.67 m/min?
4)What is the tangential velocity of a dust speck on the edge of a CD if the radius is 4.0 inches and the angular velocity is 85.33 cm/s?
5)A point rotates through an angle of 135 degrees in 90 seconds. What is its angular velocity?
6)A point rotates through an angle of 180 degrees in 18 seconds. What is its rotational speed?
7)A point rotates through an angle of 300 degrees in 3 seconds. What is its angular velocity?
8) Write 3 questions comparing linear speed and rotational speed. For examples, see slides 30 – 35 on the powerpoint.
9)What is the equation for centripetal force?
10)Calculate the centripetal force of an object that is 2234g moving at a velocity of 65 m/s and having a turn radius of 75 m.
11)Using the centripetal force equation, find the mass of an object with a centripetal force of 33N, a radius of curvature of 17 feet, and a speed of 8.0 m/s.
12)Using the centripetal force equation, fin the velocity of an object moving with a centripetal force 850N, a radius of curvature of 57M, and a mass of 2222Kg.
13)Find the centripetal force of a car with a weight of 15,000N, a velocity of 65 mi/hr north, and turning around an embankment with a radius of 77 m.
14)Describe how circular motion is involved in the use of a centrifuge.
15)Uranium ore contains multiple isotopes of uranium. You need Uranium 235 to use in a nuclear power plant. Do some quick internet research to find out how and why uranium 235 can be extracted using a centrifuge.
16)Define Axis of rotation.
17)Define and give a real life example of revolution. That is the physics kind of revolution, not the historical kind.
18)Define and give a real life example of rotation.
19)Describe how train wheels will rotate on the track in order to ensure a train will turn left.