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A uniform plank, 10.0 m long and weighing 200 N, is supported horizontally by a brick at one end and an egg at the other. A physics professor weighing 1000 N stands at the end of the plank over the brick and slowly walks toward the end supported by the egg. A force of 200 N will break the egg. What is the force exerted on the plank by the brick at the moment the egg breaks?
define the hazards for astronauts inside any spacecraft moving in the vicinity of a pulsar.
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 104 m/s, and the radius of the orbit is 5.40 106 m. What is the orbital speed of the second satellite
An object of mass 5kg is moving with an momentum of 50 kg m/s. What is the speed of the object? What is the magnitude of the momentum of the object
imagine a hole is drilled down to the center of the earth. a small mass m is dropped into the hole. find the speed of the mass just as it reaches the earth's center
A cube of metal has a mass of 0.347 kg and measures 3.13 cm on a side. Calculate the density and identify the metal
Copper has an electrical resistivity %u03C1 = 1.72 x 10-8 %u2126m. What is the electrical resistance of a copper wire
A spherical shell of inner radius a and outer radius b is constructed of uniformly magnetized material with magnetization M. (a) Find the equivalent volume and surface current distributions.
q. consider an infinite wire with radius r that carries a current ia compute b r for r lt rconsider a large parallel
A man is standing on a platform that is connected to a pulley arrangement, as the drawing shows. What pulling force should the man apply to create an upward acceleration of 1.20 m/s2
A skier traveling 11.0 m/s reaches the foot of a steady upward 19 degree incline and glides 16m up along this slope before coming to rest. compute the average coefficient of friction
An object has a volume of 3.29m^3 and a mass of 3000 kg. If the object were attached by a cable to the bottom of a swimming pool, what would be the tension in the cable
A 1000-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam.
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