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A 44.7-kilogram object is pulled 7.5 meters along a horizontal surface with a 130-Newton force at 28o above horizontal. What is the net work done on the object? (?k = 0.3)
A 4m long wire with thickness 5mm carries a current 0.4 A. A second identical wire of equal length and thickness is parallel and carries 0.6 A in the same direction. The two wires are separated by 12 cm as measured from the outside of the wire.
As measured in Earth's frame of reference, two planets are 485,000 km apart. How fast is the ship traveling
The coefficients of kinetic friction on the incline and the plane are negligible. What would be the velocity of the box right after the collision
Four wires meet at a junction. In two of the wires currents I1 = 1.03 A and I2 = 2.05 A enter the junction. In one of the wires current I3 = 6.17 A leaves the junction. Find the current in the fourth wire and indicate its direction.
A firefighter at a distance d from a burning building directs a stream of water from a fire hose at angle θi above the horizontal as shown in Figure. If the initial speed of the stream is vi. At what height h does the water strike the building?
A man does 4,335 J of work in the process of pushing his 2.80 103 kg truck from rest to a speed of v, over a distance of 27.5 m. determine the horizontal force exerted on the truck
A 55.0 kg crate rests on a level floor at a shipping dock. What horizontal pushing force is required to just start the crate moving
Intelligent beings in a distant galaxy send a signal to earth in the form of an electromagnetic wave. What is the speed vrel of the galaxy relative to the earth
q. an airplane takes off from the only airstrip in a remote area of canada flies 68.0deg north of east for 177 km then
The drive shaft AB of an automobile is to be designed as a thin-walled tube. The engine delivers 125 kW when the shaft is turning at 1500 rev/min. Determine the minimum thickness of the shaft's wall
question1a 95 m long train begins uniform acceleration from rest. the front of the train has a speed of 25ms when it
The figure below shows a hollow cylinder that has a length equal to 1.80 m, a mass M equal to 0.88 kg, and radius equal to 0.20 m. The cylinder is free to rotate about a vertical axis that passes through its center and is perpendicular to the cylinde..
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