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A boy pulls a 20-kg box with a force of 50-N @ 37 degrees above the horizontal surface. The coefficient of kinetic friction among the box and the horizontal surface is 0.15, and the box is pulled over a distance of 25m.
A) What is the work done by the boy? B) What is the work done through the frictional force? C) What is the net work done on the box?
Two objects (m1 = 4.95 kg and m2 = 2.60 kg) are connected by a light string passing over a light, frictionless pulley suspended over a table. Determine the speed of each object when the two pass each other
A hiker is wearing wool clothing of 0.40 cm thickness to keep warm. Her skin temperature is 39° C and the outside temperature is 8.0° C. what is the rate of heat conduction through her clothing
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a plane leaves seattle flies 75.0rm mi at 22.0circ north of east and then changes direction to 55.0circ south of east.
For a satellite to be in a circular orbit 800km above the surface of the earth, what orbital speed must it be given, What is the period of the orbit
An isolated capacitor of unknown capacitance has been charged to a potential difference of 119 V. Calculate the unknown capacitance
At the instant the traffic light turns green, a car that hasbeen waiting at an intersection starts ahead with a constantacceleration of 3.55 m/s^2. How fast is the car traveling when it overtakes the truck
Illustrate what constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by-side with Sally?
two protons are placed at a 5.05 cm above and below the x axis at x 0 as shown in the figure. an electron is placed
A large boulder rests on a cliff 500 m above a small village in such a position that, if it should slide off, What is the final impact velocity of the boulder
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