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After class one day, two physics learners get into an argument about rotational dynamics. Jack thinks the nickel in his pocket would beat Jill's silver ring in a race down an incline, but Jill is convinced her ring would win. To settle their argument, Jack and Jill climb up a 20 meter hill inclined at 30o to the horizontal. Both objects are released from rest at the top of the hill and roll without slipping all the way to the bottom. Obtain the translational speed of each object when it reaches the bottom? Find how long does each object take to get from the release point to the bottom of the hill?
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.7 kg · m2 and an angular velocity of +7.0 rad/s. Disk B is rotating with an angular velocity of -9.6 rad/s. The two disks are then linked together without the aid of a..
A 2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path
A new fabric is made to help athletes stay cool. It has a conductivity constant of 898.785 J/(s m K). what is the power of the materials thermal conductivity
A pendulum is made with a 4.000 kg mass suspended at the end of a thin rod. The period of the small motion simple harmonic motion is 1.000 sec. What is the length of the thin rod?
A rock is dropped from a tree of height 25 m into a lake (depth 5.0 m) below. What is the total elapsed time
Three resistors having resistances of R1=1.54ohms, R2=2.37ohms, and R3=4.78ohms respectively, Which resistor dissipates the most power and why
A bat crashes into the vertical front of an accelerating subway train. If the coefficient of friction between the bat and the trainis 0.86, what is the minimum acceleration of the train that willallow the bat to remain in place?
An ideal gas in a piston is placed in a refrigerator, which removes 686 J of energy from the gas via cooling. find the net change in the internal energy of the gas in the piston
a 80 kg student traveling in a car with a constant velocity has a kinetic energy of 1.9 x 104 j. what is the
two charges -14 c and 3.3 c are fixed in place and separated by 3.3 m. a at what spot along a line through the charges
If the airplane somehow continues to fly as if nothing had happened, where is engine relative to the airplane at the moment the engine hits ground.
You work in a materials testing lab and your boss tells you to increase the temperature of a sample by 34.9C . The only thermometer you can find at your workbench reads in degrees Fahrenheit. If the initial temperature of the sample is 75.0F, what..
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