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A lead ball is dropped in a lake from a diving board 7.32 m above the water. It hits the water with a certain velocity and then sinks to the bottom with the same constant velocity. It reaches the bottom 4.88 s after it is dropped.
(a) How deep is the lake?
(b) What is the magnitude of the average velocity of the ball for the entire fall?
(c) Suppose the water is drained from the lake. The ball is now thrown from the diving board so that it again reaches the bottom in 4.88 s. What is the magnitude of the initial velocity of the ball?
The minimum distance required to stop a car moving at 34 mi/h is 42 ft. What is the minimum stopping distance for the same car moving at 64.0 mi/h, assuming the same rate of acceleration.
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What must be the distance in meters between point charge q1 = 26.8 µC and point charge q2 = -58.7 µC for the electrostatic force between them to have a magnitude of 6.69 N
You have a compound microscope with a barrel of length 161 mm. Find the total angular magnification of the microscope for a person whose near point is 25.0 cm away
A woman with a mass 71 kg is standing on the rim of a large disk that is rotating at 0.42 rev/s about an axis during its center. The disk has mass 121 kg and a radius 5.2 meters. Compute the magnitude of the total angular momentum of the woman plus d..
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