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A wrecking ball (weight = 4800 N) is supported by a boom, which might be assumed to be uniform and has a weight of 3200 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle among the support cable and the horizontal is 32°, and the angle among the boom and the horizontal is 48°.
a) Discover the tension in the support cable.
b) Find the magnitude of the force exerted on the lower end of the boom by the hinge at point P.
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 445 Hz when the train is approaching him and 418 Hz when the train is receding from him. Using these frequencies, h..
a car starts at rest. it then accelerates at a rate of 1.3 ms east for 8.2 seconds. if itcontinues as this new velocity
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A piece of balsa wood with density 0.50g/cm^3 is released under water. What is the initial acceleration?? Repeat for a piece of maple with density 0.760 g/cm^3? Repeat for a ping-pong ball with the average density of 0.127 g/cm^3.
A projectile is launched upward at an angle. What must this angle be with respect to the horizontal in order for the projectile to travel the farthest distance? Describe why.
A light bulb emits light uniformly in all directions. The averageemitted power is 150.0 W. At a distance of 7 m from the bulb,determine (a) the average intensity of the light,(b) the rms value of the electric field, and(c) the peak value of the elect..
An atomic nucleus of mass m traveling withthe speed v collides elastically with a target particle of 3m(initially at rest) and is scattered at 90 degrees. What are the final speeds of the two particles
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light of wavelength 696 nm is incident on a single slit. the central bright fringe is 2.63 cm wide on a flat screen
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