- #1
Spartan301
- 20
- 0
Hey, I have a very easy problem.
A dancer completes 2.2 revolutions in a pirouette. What is her angular displacement?
here's my work.
Given:
2.2 revolutions.
Battle Plan:
Find angular position in radians.
Subtract final position with the initial position.
Outcome:
2.2 x 2pi = 4.4 pi radians
=13.823
sig figs: 2
=14 rad
The key says 14 rads is correct, but I'm confused because I thought that you had to subtract the final position from the initial position.
If I did that to find the true angular displacement, wouldn't it be something like 0.4 rads?
Does my math look correct, or is there a concept I'm missing?
Thanks so much.
-Tom
A dancer completes 2.2 revolutions in a pirouette. What is her angular displacement?
here's my work.
Given:
2.2 revolutions.
Battle Plan:
Find angular position in radians.
Subtract final position with the initial position.
Outcome:
2.2 x 2pi = 4.4 pi radians
=13.823
sig figs: 2
=14 rad
The key says 14 rads is correct, but I'm confused because I thought that you had to subtract the final position from the initial position.
If I did that to find the true angular displacement, wouldn't it be something like 0.4 rads?
Does my math look correct, or is there a concept I'm missing?
Thanks so much.
-Tom