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The horizontal and vertical components of the initial velocity of a football are 20m/s and 30m/s respectively. Assume that after rising to some height, the football returns back to the ground level.
(a) What is the speed of the football at t=3s after launch?
(b) To what maximum height doe the football rise?
(c) What horizontal distance does the football travel during its flight?
A uniform electric field exists between two conducting plates separated by 1.7mm . A dust grain with charge 65 nC between the plates feels a 26N electric force, Find the electric field
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A nuclear power plant has an electrical power output of 1700 MW and operates with an efficiency of 34%. what is the rise in temperature of the flowing water
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Two parallel metal plates separated by a distance of 2mm and each having an area of .5m squared carry equal, What potential difference exist between the plates
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An eagle is flying horizontally at 5.7 m/s with a fish in its claws. It accidentally drops the fish. (a) How much time passes before the fish's speed doubles? (b) How much additional time would be required for the speed to double again?
In a head-on collision, a car stops in 0.3s from a speed of 30 m/s. What is the force applied to the driver by his seat belt during the collision
A block of mass 4.6 kg slides 15 m from rest down an inclined plane making an angle of 28 o with the horizontal. what is the retarding force due to friction
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