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A 12 meter long uniform ladder is leaning against a frictionless wall at an angle of 50o above the horizontal. The ladder has 30 kilogram mass. When a 45 kilogram boy is standing 5 meter up along the ladder, obtain the magnitude of the force exerted by ladder on wall?
A 85 kg window cleaner uses a 14 kg ladder that is 5.9 m long. He places one end on the ground 3.4 m from a wall, find the angle (relative to the horizontal) of that force on the ladder
An observer in frame S standing at the origin observes two flashes of colored light separated spatially by ?x = 2980 m, Find the magnitude and direction of v.
Find the kinetic energy of a 3.70{\rm kg} cat that has 0.240 kg *m/s}} of momentum. Find the momentum of a 1.22{\rm kg} ball that has 16.0 J} of kinetic energy.
An infinitely long cylindrical insulating shell of inner radius a and outer radius b has a uniform volume charge density ?. Determine the electric field intensity everywhere
The Yerkes telescope in southern Wisconsin is the largest refracting telescope in the world. What are the focal lengths of the two lenses
A small electric car overcomes a 250 N friction force when traveling 30 km/h. How much power is dissipated in the coils
One gallon of gasoline contains 3.1 multiply.gif 107 calories of potential energy that are released during combustion. what is the average force produced by the gasoline
You are on an unknown planet. You throw an object straight up with an initial speed of 5ms. It takes 6 seconds for the object to return to your hand. Will the object's maximum height be higher or lower on the earth? What is the gravitational accelera..
Given an ordinary cylindrical glass with a volume of one half liter and filled completely to the top with water at room temperature (20C), What would be the vapor pressure for this fluid
Two converging lenses, each of focal length 14.5 cm, are placed 39.1 cm apart, and an object is placed 29.2 cm in front of the first. What is the magnifcation of the system
A ceiling fan consists of a small cylindrical disk with 5 thin rods coming from the center. The disk has mass md = 3.4 kg and radius R = 0.26 m. What is the final angular speed of the fan
A simple pendulum makes 139 complete oscillations in 3.10 min at a location where g = 9.80 m/s2. Find the length of the pendulum
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