A) Calculate the period of a ball tied to a string of length 0.7 m making 7.9 revolutions every
Answer in units of s
B) Calculate the speed of the ball.
Answer in units of m/s.
Thank you for the opportunity to help you with your question! the solution is as such:
given r = 0.7m
The period of a revolution is given by T= 1/ f
here frequency f = 7.9 rev per sec
so T= 0.126 s
now we know T = 2 pi / w
where pi =3.14 and w= angular speed
so w= 2 pi / T
w = 49.84 rad/s
now velocity v= w* r
so v= 49.84 * 0.7
34. 88 m/s
the rad/s answer is wrong
ok i am checking it again
its 49.86 .
w = 49.86 rad/s
so v= 49.86 * 0.7
let me know if you need any clarification. I'm always happy to answer
your questions.awaiting a positive feedback. thank you.
No thats what i thought initially
that answer is wrong as well
ok i am going through it again
i checked it. the answer is correct. perhaps the answer in your solution sheet is misprinted
its an online assignment, I will check with my professor thanks for help
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