A 0.30-m-radius automobile tire rotates how many rad after starting from rest and accelerating at a constant 2.0 rad/s2 over a 5.0-s interval?
a. 12.5 rad
b. 25 rad
c. 2.0 rad
d. 0.50 rad
b
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A coin and a ring roll down an incline at the same time. The one to first reach the bottom is the
A) ring. B) coin. C) both reach the bottom at the same time
A 3.0-?F capacitor charged to 40 V and a 5.0-?F capacitor charged to 18 V are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 3.0-?F capacitor?
a. 11 ?C b. 15 ?C c. 19 ?C d. 26 ?C e. 79 ?C
The graph below shows a plot of angular acceleration in rad/s2 versus time from t = 0 s to t = 8 s. The change in angular velocity, ??, during this 8-second period is
A.
, CW.B.
, CCW.C.
, CW.D.
, CCW.E.
, CW.Five boys are pushing on a snowball, and each is pushing with a force of 10.0.0 N. However, each boy is pushing in a different direction. They are pushing north, northeast, east, southeast, and south. (Each boy is pushing at an angle of 45.0° relative to his neighbor.) What is the magnitude of the total force on the ball?
a. 0 b. 14.1 N c. 24.1 N d. 11.4 N e. 48.3 N