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In the figure below, the hanging object has a mass of m1 = 0.480 kg; the sliding block has a mass of m2 = 0.770 kg; and the pulley is a hollow cylinder with a mass of M = 0.350 kg, an inner radius of R1 = 0.020 0 m, and an outer radius of R2 = 0.030 0 m. Assume the mass of the spokes is negligible. The coefficient of kinetic friction between the block and the horizontal surface is ?k = 0.250. The pulley turns without friction on its axle. The light cord does not stretch and does not slip on the pulley. The block has a velocity of vi = 0.820 m/s toward the pulley when it passes a reference point on the table. (a) Use energy methods to predict its speed after it has moved to a second point, 0.700 m away. m/s (b) Find the angular speed of the pulley at the same moment. rad/s
A 5.0 multiplied by 102-newton girl takes 10. seconds to run up two flights of stairs to the landing, a total of 5.0 meters vertically above her starting point. What power does the girl develop during her run.
A 6 cm diameter conducting loop with resistance of 10m\Omega is placed perpindicular to a variable magnetic field B. Determine the current and its direction induced in the loop
A 65kg, 1.70m tall person is standing in a room, Find the air temperature at which the heat transfer rate by radiation is just balanced by the rate of heat generation
A parallel plate capacitor has a capacitance of 8.5 µF when filled with a dielectric. What is the dielectric constant of the dielectric
The electric field midway between two equal but opposite point charges is 745 N/C, What is the magnitude of the charge on each
A thin uniform rod (mass = 1.95 kg) swings about an axis that passes through one end of the rod, What is the length of the rod
An elevator ascends 200m with maximnum speed of 5.0 m/s. how far deos the elevation move while accelerating to full speed from rest
On December 27, 2004, astronomers observed the greatest flash of light ever recorded from outside the solar system. what was the average power output (in terms of P) of this magnetar
A pipe comes diagonally down the south wall of a building, making an angle of 45? with the horizontal. Coming into a corner, the pipe turns and continues diagonally down a west-facing wall, still making an angle of 45? with the horizontal. What..
A wooden cube of side 0.30 m has density of 700 kg/m^3 and floats partially submerged in seawater(density = 1025 kg/m^3). what is the total mass of the cube
A beam of electrons is first accelerated (from rest) through a region of electric potential difference V=10 keV and then made to go through a slit of width a. What is the value of the momentum (px) of each electron
a kangaroo jumps at an angle of 80deg above the horizontal with a velocity of 15 ms. if the mass of the kangaroo is 75
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