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A 20.0 kg floodlight in a park is supported at the end of a horizontal beam of mass 20.0 kg and length L that is hinged to a pole (beam and pole are perpendicular). A cable at an angle of 30.0 degrees with the beam helps to support the light.
a) Find the tension in the cable.
b) Find the horizontal and vertical forces exerted by the beam on the pole.
A 4.0- m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall, What is the tension in the wire if the iron bar weighs 300 N and the wire is 5.0 m long
The position vector of a particle of mass 2.50 kg as a function of time is given by r with arrow = (6.00 i hat + 4.70 t j hat), Determine the angular momentum of the particle about the origin as a function of time
A tube is closed at one end and open to 16 o C air atthe other end. what is the length of the air column in that tube
The pressure on a 1 L-sample of water is increased from 1 atm to 200 atm, reducing its volume by 1%. Draw the pressure-versus-volume graph for this process
You are pushing a refrigerator across the floor of your kitchen. You exert a horizontal force of 297 N for 7.4 s, what is the total work (by all forces) done on the refrigerator
Two long, parallel wires carry currents of 0.236 Amp in the same direction. If the wires are 0.025 meter apart, obtain the force per unit length between the wires
In a fluorescent tube of diameter 3 cm, 7 10^18 electrons and 1.75 10^18 positive ions (with a charge of +e) flow through a cross-sectional area each second, What is the current in the tube
A 5.3kg box is on a frictionless 36^\circ slope and is connected via a massless string over a massless, frictionless pulley to a hanging 1.6kg weight. A- What is the tension in the string if the 5.3kg box is held in place, so that it cannot move? B- ..
The figures show a hypothetical planetary system at two different times. The spatial coordinates (x, y) of the bodies are given in Astronomical Units (AU). Find the magnitude, dS, of the star\'s displacement
a fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. the
A playground is on the flat roof of a city school, 5.9 m above the street below (see figure). The vertical wall of the building is h = 7.40 m high, Find the speed at which the ball was launched
In an old house, the heating system uses radiators, which arehollow metal devices through which hot water or steam circulates. what is the temperature of the newly painted radiator
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