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Derive an expression for the gravitational potential energy of a system consisting of Earth and a brick of mass m placed at Earth's center. Take the potential energy for the system by the brick placed at infinity to be zero.
Express your answer in terms of or all of the variables m, mass of Earth ME, its radius RE, and gravitational constant G.
a wooden box weighing 245 n is pushed across the floor by a workman who exerts a horizontal force of 172 n. if the
A 2.50-kg ball, moving to the right at a velocity of +3.83 m/s on a frictionless table, collides head-on with a stationary 8.10-kg ball. Find the final velocities of (a) the 2.50-kg ball and of (b) the 8.10-kg ball if the collision is elastic. (c) Fi..
IP At a certain distance from the center of the Earth, a 5.0- object has a weight of 3.0 . Find this distance. By what factor does its initial acceleration change
A solid cylindrical disk has a radius of 0.15 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. What is the mass of the disk
include a free body diagram. Be sure to label all forces with their agents and size. 1. A 5.0kg cat running along suddenly braces his furry feet on the slippery floot in order to stop.
Diffraction grating produces its third-order bright band at an angle of 79.4 degrees for light of wavelength 731nm. Find the angular location of the first-order bright band
A 0.50-kg object is attached to an ideal massless spring of spring constant 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of 1.7 m/s at the equilibrium position.
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. obtain the speed of a satellite in a geosynchronous orbit
a charged suphere of mass 2.8*10^-4 kg is suspended from astring. find the magnitude of electric force and the tension in the string
When you take your 1200 kg car out for a spin, you go around a corner of radius 57.7 m with a speed of 15.7 m/s. The coefficient of static friction between the car and the road is 0.80. Assuming your car doesn't skid, what is the force exerted on it ..
A thermally isolated flask containing helium gas initially at 11 K, allows the gas to slowly escape through a small tube until the pressure inside is 0.98 atm, what was the initial pressure
A 82.0 cmwire carries a current of 1.00 A. The wireis formed into a circular coil and placed in Magnetic Field of intensity 0.90 T. Find themaximum torque that can act on theloop.
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