by scruffles
Tags: graph
 P: 8 1. The problem statement, all variables and given/known data The black curve represents the position of a spot on the x-axis projection of a spinning wheel. a) Which curve represents the velocity of that spot? blue b) What is the angular speed of the wheel? c) What is the tangential speed of the wheel, assuming the full radius of the wheel is represented in this projection. d) Does the x-projection have an angular acceleration at any time on the graph? Explain. 3. The attempt at a solution I have no idea how to read this graph. The only thing I can guess is that a) would be the blue line? Please help! 1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution
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P: 26,148
hi scruffles! welcome to pf!
 Quote by scruffles a) Which curve represents the velocity of that spot? blue b) What is the angular speed of the wheel? c) What is the tangential speed of the wheel, assuming the full radius of the wheel is represented in this projection. d) Does the x-projection have an angular acceleration at any time on the graph? Explain.
(a) correct
(b) hint: how long does it take to go round 360° ?
(c) hint: how far does it go when it goes round 360° ?
(d) sorry, i don't understand the question
 P: 8 Thanks for your reply! So for b) would the angular speed would be .4s? c) would it be 0? since it goes from -8 to 8 ?
 Sci Advisor HW Helper Thanks P: 26,148 How to read graph. b) yes c) no (how much tape would you have to wind round the wheel?)
 P: 8 would i use C=2pir? c= 2(3.14)(5) = 31.4 cm?