Name_________________________________ Unit 10
Name_________________________________
Per.____________
Worksheet 2
1) The following data comes from a line drawn on a wheel from the center of the wheel out to the rim.
a- Plot the data.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |t (sec) θ (rad)
0. 0
1. 0.25
2. 1.00
3. 2.25
4. 4.00
5. 6.25
6. 9.00
7. 12.25
8. 16.00
b- What type of motion is exhibited by this graph?
c- Linearize this data. What is the equation for the line? What is the angular acceleration?
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |Draw a motion map for this extended body for the first 6 seconds using black for the angular position and instantaneous linear velocities. Include a blue angular velocity vector and a red angular acceleration vector.
2) a- A 14 inch (0.356 m) automobile tire on a car traveling at 60 mph has an angular velocity of 75.4 rad/s. If the car slows uniformly to an angular velocity of 18.7 rad/s (15 mph) in 10.0 s, what is the angular acceleration of this tire?
b- What is the angular displacement of a line drawn on the tire from center point to rim during this acceleration? Give your answer in radians and in revolutions.
c- What is the linear displacement the automobile during the 10.0 sec of acceleration?
3- A centrifuge starts from rest and reaches an angular velocity of 30000 rpm in 5.0 s. What is the angular acceleration in rad/s2 of this device?
4- An automobile engine slows from 3000 rpm to 500 rpm in 4.0 s. What is the angular displacement of the engine during this time period?
5- A flywheel rotating at 20 rpm undergoes an angular acceleration of +2.0 rad/s2 for precisely 5.0 revolutions. What is the angular velocity of the flywheel at the end of this acceleration?
6- A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. If the small wheel has a radius of 3.0 cm and accelerates at the rate of 7.5 rad/s2, and it is in contact with the pottery wheel (radius 27.0 cm) without slipping, calculate the angular acceleration of the pottery wheel, and the time it takes the pottery wheel to reach its required speed of 60 rpm.
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