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a box of textbooks at an unknown mass is set in motion with the intial speed of 0.5 m/s on a loading ramp that makes and angle of 16 degrees with the horizontal. the coefficient of kinetic friction is 0.25
A) find the normal force on the box.
B) find the acceleration of the box.
A rubber ball of mass 27.5 g is dropped from a height of 1.85 m onto a floor. What impulse was applied to the ball during the collision
At what energy does an electron become "relativistic"? Consider electrons with kinetic energies of 50 eV, 50 keV, and 50 MeV. When is it important to use the relativistic formulas
Two teams of nine members each engage in a tug of war. The first team's members have average masses of 65 kg and exert average forces of 1350 N horizontally. What is the acceleration of the two teams
Find the position of an object in front of a screen to obtain an image of size twice larger than its original size on the screen.
In an L-R-C series circuit, the resistance is 420 ohms, the inductance is 0.340 henrys, and the capacitance is 1.80×10?2 microfarads. What is the resonance angular frequency of the circuit
A flat surface with area 1.6 m2 is in a uniform electric field of 560 N/C. What is an electric flux through the surface when it is oriented as follows.
The wall of a house consists of three layers: a wooden outer wall with an R factor of 1.0, a 3in layer of fiberglass insulation with an R factor of 11, what is the rate of heat loss throug an 8ft by 15ft section of this wall
The space shuttle releases a satellite into a circular orbit 700 km above the Earth, How fast must the shuttle be moving (relative to Earth's center) when the release occurs
A small ball rolls off the roof edge with a horizontal speed of 3.2m/s. The ball hits the ground a distance of 12.6m from the building's base. Calculate the hieght of the building
Three sheets of plastic have unknown indices of refraction. Sheet 1 is placed on top of sheet 2, and a laser beam is directed onto the sheets from above, what is the expected angle of refraction in sheet 3
A 80 kg diver steps off a 13 m tower and drops from rest straight down into the water. If he comes to rest 4.1 m beneath the surface, find out the average resistance force exerted on him by the water.
what magnitude of horizontal force must the person apply to keep it moving with constant velocity? c) If the person continued to push with the force used to start the motion, what would be the acceleration of the trunk.
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