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A 95 kilogram scaffold is 7 meter long. It is hanging with two wires, one from each end. A 460 kilogram box sits 1.6 meter from the left end. Find the tension in the right hand side wire?(g = 9.8 m/s2)
A person pulls a 26kg suitcase using a rope attached to the suitcase at an angle of 28 degrees to the horizontal. The coefficient of static friction of the suitcase with the floor is 0.3 and the coefficient of kinetic friction is 0.20.
Suppose a heat engine pulls 3.37×104 J of work from the hot reservoir and 7.52×103 J of that energy is used to perform work. How much energy is rejected by the engine? (This energy is "exhausted" to the cold reservoir.) What is the efficiency of the ..
A 75 N man stands in the middle of a frozen pond of radius 20.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. How long does it take him to reach the south shore
the driver of a car wishes to pass a truck that is traveling at a constant speed of 20.2 ms. initially the car is also
A photon of red light (wavelength = 710 nm) and a Ping-Pong ball (mass = 2.20 x 10-3 kg) have the same momentum. At what speed is the ball moving
In a mass spectrometer, a singly, negative charged ion having a particular velocity selected by using a magnetic field of .10 T perpendicular to an electric field of 1000 V/m. What is the mass of the ion
A 4.9 m diameter merry-go-round is rotating freely with an angular velocity of 0.780 rad/s. Its total moment of inertia is 1550kg*m2. Four people standing on the ground, each of mass63.6 kg, abruptly step onto the edge of the merry-go-round.
A nuclear power plant generates 3000 MW of energy from nuclear reactions in reactor’s core. This energy is used to boil water and produce high pressure steam at 300 0C.
Jennifer, who has a mass of 50.0 kg, is riding at 35.0 m/s in her red sports car when she must suddenly slamon the brakes to avoid hitting a deer crossing the road. What average force would the windshield have exerted on her
The drawing shows an edge-on view of two planar surfaces that intersect and are mutually perpendicular. Surface 1 has an area of2.0 m2, while surface 2 has an area of 3.9m2.
Charge q1 = 8.5 nC is located at the coordinate system origin, while charge q2 = 3.7 nC is located at (a, 0), In Joules, what is the total potential energy U of the final configuration of three charges
a bathysphere used for deep-sea exploration has a radius of 1.50 m and a mass of 1.19 x 104 kg. in order to dive this
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