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A particle has shifted along some trajectory in the plane xy from point 1 whose radius vector r1 = i 2j to point 2 with the radius vector r 2 = 2i - 3j. During that time the particle experienced the action of certain forces, one of which being F = 3i 4j. Find the work performed by the force F. (Here 7.1, r2, and F are given in SI units).
How much work is completed in charging the capacitor
A block of 4.4 kg is held at the top of a smooth incline. The incline has height of 2.1 m and is at an angle of 19 degrees above the horizontal. How much work was done by friction on the block
Two people start at the same place and walk around a circular lakein opposite directions. One walks with an angular speed of2.00 10-3 rad/s, while the other has an angularspeed of 3.20 10-3 rad/s. How long will it be beforethey meet?
A 50-gram ice cube at 0 degrees celsius is heated until 40 grams has become water at 100 degrees celsius and 5.0 grams has become steam at 100 degrees celsius
A setup similar to the one shown in the figure below is often used in hospitals to support and apply a horizontal traction force to an injured leg. Determine the force of tension in the rope supporting the leg
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You are on an airplane traveling 30° south of due west at 160.0 m/s with respect to the air. What is the heading of the plane with respect to the ground
An object's temperature increases, and in so doing its radiation power increases by a factor of 2.00.find the ratio of the new temperature to the original temperature
A card containing two slits separated center-to-center by 0.1mm, is illuminated by a red laser (lambda = 632:82nm). If the fringes on an observing screen are to be 10mm apart, how far away (in m) should the screen be?
A 9.0-V battery is connected in series with a 35-mH inductor, a 168-? resistor, and an open switch. How much energy is stored in the inductor at this time
A person with a mass of 80kg stands on two snowshoes with areas of 2500cm^3 each. What is the total pressure on the snow
a 5 kg block is fastened to a vertical spring that has a spring constant of 1000 newtons per meter. a 3 kg block rests
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