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Three forces, act on a mass of 4.2 kg. The forces are X = 2.0 N acting to the east, Y = 5.0 N acting 45o to the north of east, and Z = 4.0 N acting 30o to the north of west. What is the magnitude of the net acceleration of the mass?
A coin is thrown vertically down into a well with an initial velocity of 2.5 m/s. What is the velocity of the coin
The model airplane in Figure 5.7 is flying at a speed of 14.4 m/s on a horizontal circle of radius 17.2 m. The mass of the plane is 1.19 kg. What is the net work done on the plane
Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 2.36 m/s. What is the height of the hill
A loudspeaker of mass 22 {rm kg} is suspended a distance of h = 2 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
A lens that is "optically perfect" is still limited by diffraction effects. Suppose a lens has a diameter of 130mm, What is the linear width (diameter) of the central maximum at the focal distance of the lens
Travel past the Earth in a straight line
a uniform door 0.81 m wide and 2.1 m high weighs 140 n and is hung on two hinges that fasten the long left side of the
1. a ship has a top speed of 3.0 ms in calm water. the current of the ocean tends to push the boat at 2.0 ms on a
A train 389 m long is moving on a straight track with a speed of 40.6 m/s. The engineer applies the brakes at a crossing, find how long (in s) the train blocked the crossing
The coefficient of linear expansion of gold is 14 x 106 °C. Find the coefficient of linear expansion on Fahrenheit scale
A ball is thrown straight up from the edge of the roof of the building. A second ball is dropped from the roof a time of 1.01 s later. You may ignore air resistance.
A person sees a heavy stone strike the concrete pavement. A, moment later two sounds are heard from the impact: How far away did the impact occur
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