Consider a bicycle wheel in which two external torques act. One acts in the clockwise direction and the other acts in the counter-clockwise direction. The torques are equal in magnitude. Which of the following statements is possibly TRUE? Select TWO answers.
A) The angular momentum of the bicycle wheel is zero.
B) The angular momentum of the bicycle wheel is increasing.
C) The angular momentum of the bicycle wheel is decreasing.
D) The angular momentum of the bicycle wheel is non-zero and constant.
Answers: 3
Physics, 22.06.2019 14:40
Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?
Answers: 3
Physics, 22.06.2019 16:30
The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ftâ
lbflbmâ
r(1 psia144 lbf/ft2) = 0.3704 psiaâ
ft3lbmâ
r the amount of air that must be added to raise the pressure is lbm
Answers: 3
Physics, 22.06.2019 19:30
Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, âfâ =maâ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: aâ 1=âgj^.
Answers: 1
Physics, 23.06.2019 03:00
Suppose the house in question 3 is located in cleveland where the annual average solar flux is 160 w/m2 . if 10 m2 of solar panels operating at 20 percent efficiency were installed on this house to collect and store solar energy in the form of hot water:
Answers: 2
Consider a bicycle wheel in which two external torques act. One acts in the clockwise direction and...
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