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A 298 kg piano sits 1/4 of the way from the end of a 127 kg uniform, horizontal beam that has a support at each end. What is the vertical force on the support closest to the piano?
The tension in a steel wire of 2.7m long and 1.0 cm in diameter (p = 7800 kg / m ^ 3) is 840 N. What is the fundamental frequency of vibration of the cable
In a head-on collision, a car stops in 0.19s from a speed of 26m/s The driver has a mass of 63kg and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second
Carl Lewis set a world record for the 100.0 m run with a timeof 9.86 s. If, after reaching the finish line, Mr. Lewis walkeddirectly back to his starting point in 90.9 s, what is the magnitude of his average velocity for the 200.0 m?
An intense light source radiates uniformly inall directions. At a distance of 5.2 {\rm m} from the source the radiation pressure on aperfectly absorbing surface is6.9×10-6 {\rm Pa}. What is the total average power output of the source
A block is located on a frictionless plane that is inclined at an angle of 20 degrees. It is held in place by a rope parallel to this plane and which ahs a tension of 100 N. What is the weight of the block?
The primary coil of a transformer has N1 = 4.00 102 turns, and its secondary coil has N2 = 1.20 103 turns. If the input voltage across the primary coil is ?v = (140 V) sin ?t, what rms voltage is developed across the secondary coil? V
An airplane travels 3100km at a speed of 790km/h, and then encounters a tailwind that boosts its speed to 990km/h for the next 2800 km. what was the average speed of the plane for this trip
A spring of spring constant 11,000N/M is compressed by a block of mass 3kg is released from rest at the top of the incline plane. how far has the block moved down the incline
A 3-kg block is pulled along a FRICTIONLESS surface with a force of 42N. What is the force exerted on the 2-kg block by the 1-kg block
Kirk and Spock have the chance to take a tour of an ancient space station that was built before gravitational field generators were developed. Find the apparent acceleration experienced by the crew remaining on the rim
If you hold a 400 cm^2 square plane mirror 43cm from your eyes and can just see the full length of an 8.1m falgpole behind you
A ball of mass m is dropped vertically onto a spring, a with spring constant k from a height of h above the top of the spring. Obtain the total work done by friction during the process
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