Homework Clinic
Science Clinic => Physics => Topic started by: Lobcity on Jul 29, 2018
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A mechanic is examining the wheel of a bicycle to adjust the brake. With the bicycle off the ground, he manually rotates the wheel until it reaches an angular speed of 12.0 rad/s and then allows it to coast to a stop.
If the wheel has a moment of inertia of 0.100 kg m2, and the wheel slows uniformly to a stop in 160 s, what is the magnitude of the retarding torque? A) 1.00 N m
B) 0.00750 N m
C) 0.0787 N m
D) 1.33 N m
E) 1.67 N m
Question 2
Which statements must be true about the surface of a charged conductor in which no charge is moving? (There could be more than one correct choice.)
A) The electric field is zero at the surface.
B) The electric potential of the surface is zero.
C) The electric field is constant at the surface.
D) The electric potential is constant over the surface.
E) The electric field is perpendicular to the surface.
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Answer to Question 1
B
Answer to Question 2
D, E
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Thank you
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Thank you