Physics, 06.05.2020 02:20 Juicebox18
A 15 year old girl is riding on a playground merry-go-round, being pushed around by her friend, similar to that pictured above. The rider has a mass of 50.0 kg and a two handed grip strength of 445 N. The coefficient of friction between her and the merry-go-round is 0.100. Her friend spins her at a rate of 40 rev/min.
a. What is the frictional force, f, acting on the girl?
b. What is the angular velocity, ω, in radians/second?
c. What is the tangential velocity, vT of the girl?
d. What is the total centripetal force, she needs to exert to not fly off of the merry-go-round?
e. Given the frictional force and her grip strength, is the girl able to stay on the spinning merry-go-round?
d. What is the total centripetal force, she needs to exert to not fly off of the merry-go-round?
Answers: 3
Physics, 22.06.2019 01:00
First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit
Answers: 2
Physics, 22.06.2019 15:30
Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples
Answers: 1
A 15 year old girl is riding on a playground merry-go-round, being pushed around by her friend, simi...
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