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A uniform electric field of magnitude 256 V/m is directed in the negative y direction. A +12.9 uC charge moves from the origin to the point (x, y) = (20.0cm, 45.6 cm). What was the change in the potential energy of this charge?
question1a 20 rm kg uniform door has a width of 1.2 rm m and a height of 2.5 rm m. the door is mounted on a post by a
A golf ball strikes a hard, smooth floor at an angle of 30.0?? and, as the drawing shows, rebounds at the same angle. What is the magnitude of the impulse applied to the golf ball by the floor
A ladder 5.6 m long leans against a wall inside a spaceship. From the point of view of a person on the ship, Find the angle the ladder makes with the floor
A thin rod with length L has a linear density that varies as D = dm/dx = Ax, Calculate the total mass of the rod in terms of A and L
A five-sided object, whose dimensions are shown in the drawing, is placed in a uniform magnetic field. Determine the magnetic flux through the slanted side
The flywheel of a motor has a mass of 300 kg and a moment of inertia of 580 kg*m^2 The motor develops a constant torque of 2000 N*m and the flywheel starts from rest. How much work is done by the motor during the first 4.00 revolutions
A ski starts from rest and slides down a 29° incline 100 mlong. Use energy methods. If the coefficient of friction is 0.09, what is the ski's speed at the base of the incline
A 12.0-{rm kg} box resting on a horizontal, frictionless surface is attached to a 5.00-{rm kg} weight by a thin, light wire that passes over a frictionless pulley). The pulley has the shape of a uniform solid disk of mass 2.40 {rm kg} and diameter 0...
An isolated charged conducting sphere of radius 12.0 cm creates an electric field of 4.90 104 N/C at a distance 22.0 cm from its center. What is its surface charge density
A light meter stick is balanced at the 60 cm mark with a 200-g mass is hung from the 90 cm mark and a 100-g mass is hung from the 10 cm mark, Find the mass (in g) of the ruler
After the reorganization, Barbara owns 25% of Acme's stock. Barbara has an adjusted basis of $400,000 in her Fisher stock. Barbara's basis for her Acme securities is?
three forces when added produce a resultant force that is 100N pointing 63° above the positive x-axis. what are the magnitude and direction of the third force
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