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A 121-kg horizontal platform is a uniform disk of radius 1.63 m and can rotate about the vertical axis through its center. A 65.9-kg person stands on the platform at a distance of 1.01 m from the center and a 26.7-kg dog sits on the platform near the person, 1.37 m from the center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis.
two particles, each with mass m = 0.95 kg, are fastened to each other, and to a rotation axis at O, by two thin rods, each with length d = 5.8 cm and mass M = 1.4 kg. what is the combination's kinetic energy
The penny-farthing is a bicycle that was popular between 1870 and 1890. As the figure shows, this type of bicycle has a large front wheel and a small rear wheel. On a Sunday ride in the park the front wheel (radius = 1.05 m) makes 444 revolutions. Ho..
Your radio station needs a new coaxial cable to connect the transmitter and antenna. One possible cable consists of a 2.0mm diameter inner conductor and an outer conductor with diameter 1.6cm and negligible thickness (see the figure); the maximum saf..
When an object of 180 kg hangs from a cord around light pulley of the cord between point P and the pulley is lenght L = 2.0 m. how many loop will be formed
Photographic cameras on spy satellites supposedly can read the license plate of a car on the ground. How large is the diameter of the camera required for such a feat
If a hot air balloon floats at a constant elevation (it has reached equilibrium) where the local atmospheric pressure is 98 kPa (abs) and outside air temperature is 285 K, and the hot air inside the balloon is at 400 K
A point mass of m1 = 2.3 kg is placed at the origin. Masses m2 = 5.4 kg and m3 = 7.6 kg are placed at 3.5 m and -5.8 m on the x-axis, respectively. Find out the location on the x-axis of the center of mass.
A laser that produces a spot of light that is 1.25 mm in diameter is shone perpendicularly on the center of a thin, what is the power of the laser
when it is very far from the asteroid it will be traveling with speed 187 m/s. We have a large and powerful spring whose stiffness is 3.0 105 N/m. Explain how much must we compress the spring?
A jet airplane is in level flight. The mass of the airplane is m = 8890 kg. At what angle is the airplane banked
An archer shoots an arrow toward a 300-g target that is sliding in her direction at a speed of 2.50 m/s on a smooth, slippery surface. What is the speed of the arrow after passing through the target
A 5.40×10-2- wad of putty is thrown horizontally at the block, hitting it with a speed of 2 and sticking. far does the putty-block system compress spring.
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