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A 1.70 kilogram rock is released from rest at the surface of a pond 1.00 meter deep. As the rock falls, a constant upward force of 4.40 Newton is exerted on it by water resistance. Determine the non conservative work done by water resistance on the rock? Determine the gravitational potential energy of the system? Determine the kinetic energy of the rock? Determine the total mechanical energy of the system, E, for the following depths below the water's surface. Let y = 0 be at the bottom of the pond.
You are holding a bulletin board weighing 8.68 N in place against a wall while your friend secures it to the wall. How large must this force be if the coefficient of static friction with the wall is 0.42
A boat with an engine speed of 12 m/s directs its motion straight east across a river that is flowing south at 3 m/s. What is the reultant speed and direction of the boat's path
Jupiter has a radius of 71,492km and a mass of 1.9x10^27 kg. Jupiter's moon has a mass of 9x10^22kg and orbits at a distance of 422x10^3km
A magnetic field is directed at a 40.0 angle to a plane circular loop of wire with a radius of 26.8 cm. a) Draw a diagram showing the wire loop, compute the induced emf in the wire loop
An alpha particle (a helium nucleus, containing 2 protons and 2 neutrons) starts out with kinetic energy of 9.9 MeV (9.9x106 eV), What is the final kinetic energy of the gold nucleus
Air that occupies 0.19 cubic meters at 1.03e+05 Pa gauge pressure is expanded isothermally to atmospheric pressure, Compute the work done by the air
when a person visits the local tanning salon they absorb photons of ultraviolet light uv to get the desired tan. what
An object is undergoing SHM with a maximum speed of 8.61 m/s and the maximum acceleration of 1.68 m/s2. What is the period of this motion
he two 0.50-kg weights of a cuckoo clock descend 1.5m in athree-day period. At what rate is gravitational potential energy decreased
A 0.200H inductor is connected in series with a 85.0? resistor and an ac source. Derive an expression for the voltage vR across the resistor
the surface waters of tropical oceans are at a temperature of 28c while water at a depth of 1200 m is at 3c. it has
A charge +q is located at the origin, while an identical charge is located on the x axis at x = +0.53 m. A third charge of +2q is located on the x axis at such a place that the net electrostatic force on the charge at the origin doubles, its direc..
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