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A mass weighing 20 kg stretches a spring 5 cm. The mass is displaced an additional 5 cm below equilibrium position and then released. Suppose the initial velocity is v = 0 and there no other forces. (Take g = 10m/s2) Find the times at which the mass is at its lowest position.
A human cannon ball is launched at 25.0 m/s at an angle of 30.0 degrees from horizontal. What is the velocity of the human after 0.540 seconds in terms of i and j
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. What is the mass of this canister
You are looking straight down on a magnetic compass that is lying flat on a table. A wire is stretched horizontally under the table, parallel to and a short distance below the compass needle.
a metal sphere of radius 5.00 cm is initially uncharged. how many electrons would have to be placed on the sphere to
A 20lb weight is suspended from the end of a vertical spring of negligible mass. This much weight stretches the spring by 6nches. It is then pulled 2 inches down and released.
A student of weight 660 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude of the normal force FN on the student from the seat is 551 N.
A certain loudspeaker has a diameter of 45 cm. At what frequency would the wavelength of sound it emits in air be equal to its diameter.
In a model AC generator, a 500-turn rectangular coil 8.0 cm by 20 cm rotates at 120 rev/min in a uniform magnetic field of 0.60 T. what is the maximum emf induced in the coil.
A 250 kg weather rocket is loaded with 100kg of fuel and fired straight up. It accelerates upward at 32m/s2 for 34 s, then runs out of fuel. overlook any air resistance effects.
A Carnot engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a large tub of ice and water. how many kilograms of ice in the tub
A bucket filled with water has a mass of 64.9 kg and is attached to a rope that is wound around a 0.4 m radius cylinder. Illustrate what torque does the bucket produce around the center of the cylinder?
A hoop and a disk, both of 0.44- m radius and 5.0- kg mass, are released from the top of an inclined plane 3.5 m high and 8.7 m long. What is the speed of the hoop
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