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A string with a mass of 31 g and a length of 2 m is stretched under a tension of 67 N. How much power must be supplied to the string to generate a traveling wave that has a frequency of 51 Hz and an amplitude of 4 cm.
How much work is needed to move it at constant speed.
A bullet of mass 0.0025 kg moving at 581 m/s impacts a large fixed block of wood and travels 5.40 cm before coming to rest.
A wire of length L = 15 is bent into a semi circle . If the total charge on the wire is -45nC, determine the electric field at the center point of the semicirlce.
You're carrying a 4 m long, 23 poles to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold other end of the pole 35 from its tip. How much force should you exert to keep the pole motionle..
The bowling ball has a diameter of 20.6 {rm cm}, and the angle the stick makes with the horizontal is 30.0 {rm ^circ}. You may suppose there is no friction between the stick and the bowling ball, though friction with the floor must be taken into acco..
A non-uniform bar 5 meters has a center of gravity 1 meters from the heavy end. If it is placed on the edge of a block 1 meters from the light end and a weight of 1497N is placed at the light end of the bar, it will be balanced. What is the weight..
A high-speed flywheel in a motor is spinning at 450 rpm when a power failure suddenly occurs. The flywheel has mass 37.0kg and diameter 71 cm. The power is off for 27.0s and during this time the flywheel slows due to friction in its axle bearings...
Assume an astronaut in training sits in a seat at one end, facing the axis of rotation 29.0 ft away. Determine the rotation rate, in revolutions per second, required to give the astronaut a centripetal acceleration of 18.5g.
Two speakers, one directly behind the other, are each generating a 152-Hz sound wave. What is the least separation distance between the speakers that will produce destructive interference at a listener standing in front of them.
A uniform disk turns at 4.3 around a frictionless spindle. A nonrotating rod, of the same mass as the disk and length equal to the disk's diameter, is dropped onto the freely spinning disk.
Assume a constant upward slope of 32; calculate the horizontal and vertical components of the acceleration of a truck that slowed from 140 to rest in 7.3.
The bullet becomes embedded in the block. if the coefficient of kinetic friction between the block and surface is .65 what was the speed of the bullet at once before impact.
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