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Q. two movers have to lift a refrigerator onto a truck. one of the movers want to lift the refrigerator vertically but the other mover wants to roll it up a ramp by applying a force parallel to the ramp. assume the height of the truck is 1.5 m the length of the ramp is 5 m and the weight of the refrigerator is 1200 N. Calculate the force and the total work required in each case. which method is easier?
Q. A loudspeaker of mass 25.0 kg is suspended a distance of h = 1.40 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.50 m. Find the tension in each of the cables.
A ball is thrown nearly vertically upward from a point near the edge of a tall building. it misses the edge of the building in ts way down and passes a point 160ft below its starting point 5 seconds after it leaves the thrower's hand.
What is tension in each string
How numerous revolutionsthe wheel have made through the time
what was the initial speed of the bullet. find the heat that flows in 1.0 s through a lead brick 15 cm long if the temperature difference between the ends of the brick is 8.5 degrees celsius. the cross sectional are of the brick is 12 cm squared.
An airplane wishes to fly from new york to ottawa. from new york, ottawa is located 780km West23degreesNorth. there is a wind blowing from a bearing of 310 degrees and if the plane flies at 890km/h, what bearing should the pilot steer to fly direc..
A plate carries a charge of -3.7 C, while a rod carries a charge of +1.9 C. How many electrons should be transferred from the plate to the rod, so that both objects have the same charge.
what force is needed to pull a 150 pound sled along a horizontal surface? The coeficient of kinetic friction is 0.10 and the sled is pulled by a rope that makes the angle of 0 degree with the horizontal. There is no acceleration.
What is the target's speed just after the bullet emerges.What is the velocity v of the smaller fish before lunch.
Most dentist in the United States are make as the majority of nurses are female. These differences show how different cultures define.
A solid, rectangular iron bar measures .40cm by 1.0cm by 30cm. Find the resistance between each of the three pairs of opposing faces, assume the faces in question are quipotentials.
Find out the work completed by neoconservative forces in stopping plane. At the nozzle exit, diameter is 2.5 cm and the density is 1.29kg/m^3. What is the speed of the air as it leaves the nozzle.
Two balls, of masses = 49 and = 67 , are suspended as shown in the figure. The lighter ball is pulled away to a 66 angle with the vertical and released. suppose that positive axis is directed to the right. What is the velocity of the lighter ball ..
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