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Several children are on a sled pulled by a four-wheeler across a level snow-covered field. The sled is moving at a constant speed of 9.35 m/s, and the tow rope (parallel to the ground) makes an angle of 35.0° with respect to the velocity of the sled (see the figure below). If the tension in the rope is 35.0 N, determine the work done on the sled by the tension in the rope in 10.0 s.
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When jumping straight down, you can be seriously injured if you land stiff-legged. In a stiff-legged landing he comes to a halt in 2.5 ms. Find the average net force that acts on him during this time
Three point charges are arranged along the x axis. Charge q1=-4 nC is located at x=0.240m and charge q2=2.10 nC is at x=-0.350m, What is the direction of the net force on q3
A metallic, spherical Christmas tree ornament has a diameter of 16.00 cm. find where will he see his reflection in the mirror
A 20.0 ?, 9.00 ?, and 9.00 ? resistor are connected in parallel to an emf source, What is the potential difference across the source
how much energy is lost through a window with a 1x2m^2 larg, 3 mm thick glass sheet, if temperature difference between outside
A beam of protons at an accelerator creates a current of 120 mu/A. how many protons strike the target in 30.0 s
A plastic film of thickness 290 nm appears to be green (?green = 510 nm), What is the plastic's index of refraction
Analysis of Physics, Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A1 is 1 square inch, and the area A2 is 10 square inches
A two-ended "rocket" that is at first stationary on a frictionless floor, with its center an origin of an x axis.
100.0 W tungsten filament bulb generates 95.0 W of heat, determine difference in temp. between inner and outer surface of glass
A baseball approaches home plate at a speed of 46.0 m/s, moving horizontally just before being hit by a bat. What is the average vector force the ball exerts on the bat during their interaction
Astronomers have recently discovered a new planet in a faraway solar system, with a radius of roughly 380 km. calculate the minimum density of the planet
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