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One afternoon I was sitting on a bench in the park when a boy went running by me and then lept into a swingset that was just hanging there at rest. I noticed when this happened the swingset swung about 65.0° up from the vertical. The length of the chain of the swing set couldn't be more than 2.00 m. Typically people can run about 5.00 m/s. Assuming the chain has no mass, and the swingset seat was about 2.00 kg, what was the boy's mass.
A 250 N force is applied at a37° angle to the surface of theend of a square bar. The surface is 4.00 cm on a side. What is the shear stress on the bar
A point charge Q is trapped at the center of a thin-walled hollow conductive sphere of radius R, How much charge will collect on the inside surface of the hollow sphere
A space station in the form of a large wheel, 311m in diamter, rotates to provide an "artificial gravity" of 5.2m/s^2 for people located on the outer rim. Find the rotational frequency of the wheel
Compute the ground state energy and wavefunction
a person who weighs 800 N is squatting on a scale. Suddenly he stars jumping, extending his legs as quickly as possible, so that he can ump into the air. as the person is in the process of jumping (accelerating upward) the reading of the scale is ..
suppose the length L of the uniform bar is 3.00 m and its weight is 230 N. Also, let the block's weight W = 350 N and angle ? = 30°. find the maximum possible distance x before the wire breaks
two wires are welded together end to end. the wires are made of the same material, but the diameter of one is twice that of the other. what is the length of the thick wire
Define a lie in the strict or formal sense and explain what is meant by communication - what is the principal purpose of communication?
A wire carries a steady current of 2.60 A. A straight section of the wire is 0.750 m long and lies along the y axis within a uniform magnetic field, = 1.40 T. what is the magnetic force on the section of wire
Consider a system of three noninteracting identical bosons that move in a common external one-dimensional harmonic potential. Find the energy levels and wave functions of the ground state
A converging lens (f = 14.6 cm) is located 31.4 cm to the left of a diverging lens (f = -7.91 cm), Find the overall magnification
At a factory, a noon whistle is sounding with a frequency of 480-Hz. As a car travelling at 79 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory.
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