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A ring of diameter 7.00 cm is fixed in place and carries a charge of +5.00 µC uniformly spread over its circumference.
(a) How much work does it take to move a tiny +3.50-µC charged ball of mass 1.70 g from very far away to the center of the ring? (Assume the ball is moved along the axis of the ring.)
(b) Is it necessary to take a path along the axis of the ring? (I.e. is the amount of work done dependent on the path taken to bring the ball to the center of the ring?) Yes No Why?
(c) If the ball is slightly displaced from the center of the ring, what will it do? (Assume the displacement is along the axis of the ring.) accelerate away from the ring accelerate toward the ring What is the maximum speed it will reach?
An electric motor rotating a workshop grinding wheel at a rate of 1.13 102 rev/min is switched off. How long does it take for the grinding wheel to stop
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A roller coaster, loaded with passengers, has a mass of 1500kg; the radius of curvature of the track at the bottom point of thedip is 24 m. what force is exerted on the vehicle by the track
A 900 kg car is going 20 m/s along a level road. How large a constant retarding force is required to stop it in a distance of 30 m? Perform the calculations for a (a) smooth road and (b) road with coefficient of rolling friction of 0.03.
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A physics lecture room has a volume of 251m^3. Calculate the mass of the air in the room
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A positron and an electron each of mass 9.1 x 10-31kg are in the same general vicinity and have very small initialspeeds. They then annihilate each other producting two photons
A "swing" ride at a carnival consists of chairs that are swung in acircle by 12.0 m cables attached to a vertical rotating pole, asthe drawing shows. (θ = 66.0°) Suppose the total mass of a chair and its occupant is 234 kg.
q1. an electron starts from rest 75.5 cm from a fixed point charge with q -0.150 microc. how fast will the electron be
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