The wheel has radius R = 60 cm YA and is free to rotate without friction about a central axle. A force F = 15N is applied to R the wheel as shown, at distance r 20 cm. from the axle. = 50° а. What is the magnitude of the torque corresponding to the force F, calculated about the axle? b. What is the direction of the torque vector? With the wheel starting from rest, this torque is applied constantly. After three revolutions, its final angular speed is wf = 8.0 s-1. What was its angular acceleration a? с.

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Chapter11: Angular Momentum
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1.
The wheel has radius R = 60 cm
YA
and is free to rotate without friction about a
central axle. A force F = 15N is applied to
the wheel as shown, at distance r = 20 cm.
from the axle. O = 50°
а.
What is the magnitude of the
torque corresponding to the force
F, calculated about the axle?
b. What is the direction of the torque vector?
C.
With the wheel starting from rest, this torque is applied constantly. After three
revolutions, its final angular speed is wf = 8.0 s¬1. What was its angular acceleration a?
d. What is the moment of inertia of the wheel?
e. Assuming the wheel to be a uniform solid disk, what is its mass?
f.
Bonus (2 extra points): What is the final angular momentum of the wheel?
Transcribed Image Text:1. The wheel has radius R = 60 cm YA and is free to rotate without friction about a central axle. A force F = 15N is applied to the wheel as shown, at distance r = 20 cm. from the axle. O = 50° а. What is the magnitude of the torque corresponding to the force F, calculated about the axle? b. What is the direction of the torque vector? C. With the wheel starting from rest, this torque is applied constantly. After three revolutions, its final angular speed is wf = 8.0 s¬1. What was its angular acceleration a? d. What is the moment of inertia of the wheel? e. Assuming the wheel to be a uniform solid disk, what is its mass? f. Bonus (2 extra points): What is the final angular momentum of the wheel?
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