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Find the gravitational attraction between two solid lead spheres of 1 kg mass each if the spheres are almost in contact. Express the answer as a fraction of the weight of either sphere.
What is an actual mechanical advantage of the system
A 45.0kg girl is standing on a 170 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.53m/s relative to the plank.
In order to manufacture these coffee tables, the company would need to incur $525,000 in fixed costs for new equipment. Calculate the break-even point of the coffee tables in units sold.
Tim and Rick both can run at speed and walk at speed, with. They set off together on a journey of distance. Rick walks half of the distance and runs the other half. Tim walks half of the time and runs the other half.
What is the speed of the arrow as it leaves the bow?
A water pipe having a 2.9 cm inside diameter carries water into the basement of a house at a speed of 0.87 m/s and a pressure of 174 kPa, What is the speed and water pressure at the second floor
What must be the mass m2 of the hanging block if it is to descend 11.0m in the first 3.00s after the system is released from rest
Using the capacitance determined in part (a), calculate the current in the circuit 7.4 ms after the switch is closed. Suppose that the capacitor is uncharged initially and that the emf of the battery is 9.0 V
To explain why he seems to hang in the air, compute the ratio of the time he is above ymax/2 moving up to the time it takes him to go from the floor to that height. You may ignore air resistance.
Explain how many penguins of mass 27 kg each can stand on the ice block before they get their feet wet?
A machine has an 650 g steel shuttle that is pulled along a square steel rail by an elastic cord (see figure below). The shuttle is released when the elastic cord has 16 N tension at a 45° angle
A box stands against the wall of a cylinder that is rotating. The cylinder has a radius of 30cm. What is the minimum consant speed (magnitude of linear velocity) the box must move so it doesn't slip
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