- #1
xortan
- 78
- 1
1. A spool of wire is rolled out along a level floor. If the radius of the spool is 48.0 cm and the spool makes 2.1 revolutions, what length of wire (in cm) is unwound?
velocity = (angular velcity)(radius)
2.1 rev * 2pie radians/rev. I know the revs will cancel and i will have 4.2pie radians
Since velocity = Distance/time i will say time=1 min then i get distance=(48.0)(4.2pie) which is 201.6pie cm/min and i will divide this by 60 to get 3.36pie cm/sec
Am i going in the right direction? I don't know if what i did so far is right or if I am missing something, thanks in advance for the help this would really help me for the midterm i got on tuesday
velocity = (angular velcity)(radius)
2.1 rev * 2pie radians/rev. I know the revs will cancel and i will have 4.2pie radians
Since velocity = Distance/time i will say time=1 min then i get distance=(48.0)(4.2pie) which is 201.6pie cm/min and i will divide this by 60 to get 3.36pie cm/sec
Am i going in the right direction? I don't know if what i did so far is right or if I am missing something, thanks in advance for the help this would really help me for the midterm i got on tuesday