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Questions (13)
A military jet is flying at 224 m/s in a tight circular turn. If the military jet reaches a centripetal acceleration of 8.00
2 answers
586 views
A washing machine needs 17.9 s to speed up from rest to top speed of 5 rotation for every 2.78 s. If the damp cloths inside are
2 answers
499 views
A bike wheel is spun until it reaches an angular velocity of 2.00 rad/s. It was spun for 1.96 s. What was its change in angle
1 answer
696 views
A 0.200 m long string that has a ball attached to it is spinning around on a flat horizontal plane. It spins over a 116° angle
0 answers
464 views
A merry-go-round has an angular velocity of 5.20 rad/s. A ribbon is tied at the end of one of the arms and it has speed of 3.60
1 answer
619 views
A 35.1 g pinball starts at the top of a frictionless pinball table inclined at 46.0°. If the ball is released and the spring at
0 answers
713 views
You are lawn bowling and bowl a ball with a speed of 5.00 m/s. Unfortunately, your ball hits a large rock of mass 400 g,
0 answers
1,224 views
A 21700 kg train is reaching the end of the line. In order to slow down, the front of the train snags a cable that is attached
0 answers
634 views
You throw a 238 g baseball straight up from a height of 1.73 m and it reaches a height of 13.2 m. Using conservation of energy,
1 answer
419 views
One end of a spring is attached to a wall and Jamie pulls on the other end of the spring with a force of 200 N, stretching the
1 answer
1,542 views
Calculate for Bohr's atomic model the speed of the orbiting electron in the
n = 7 state. (Answer in m/s)
0 answers
499 views
A concave spherical mirror has a radius of curvature of 18 cm. Locate the images for object distances as given below. In each
1 answer
1,771 views
Two fixed, non-conductive, isolated rings of radii 25 cm are electrified and brought close to each other so that they are
7 answers
586 views
Answers (5)
Thanks!
i think its 5157.9442 radians
Yeah the answer is wrong so what should be correct ?
Hey elena but why is my method wrong ?
I solved it like this let charge of the ball be Q let charge of unkown ring be Q2 let the place where there is equilbrium be P. This point P is 0.25m from the ring with known charge and and hence 0.75m from the ring with unknown charge. Now applying
