Physics, 29.11.2019 05:31 kgflol5692
Aspring 1.50 m long with force constant 448 n/m is hung from the ceiling of an elevator, and a block of mass 10.9 kg is attached to the bottom of the spring.
(a) by how much is the spring stretched when the block is slowly lowered to its equilibrium point? (enter the magnitude only.) m
(b) if the elevator subsequently accelerates upward at 1.89 m/s², what is the position of the block, taking the equilibrium position found in part (a) as y = 0 and upwards as the positive y-direction. (indicate the direction with the sign of your answer.) m
(c) if the elevator cable snaps during the acceleration, describe the subsequent motion of the block relative to the freely falling elevator. what is the amplitude of its motion?
Answers: 2
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Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?
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Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.
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Two positive charges are equal. which has more electric potential energy?
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Aspring 1.50 m long with force constant 448 n/m is hung from the ceiling of an elevator, and a block...
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