To find Angular Displacement

Nov 2009
94
0
Hello,
Need help on how to set this up and the answer, so I can study it to understand it.

A shaft whose diameter is 10 cm rotates with an angular speed of 1.00 rad / second. Calculate the angular displacement IN RADIANS, if the shaft rotates for 3.75 seconds??

PLEASE HELP STUCK ON THIS>
I know you convert the diam which comes to 0.05 m for RADIUS
But don't know which formula to use tho??

THANKS for your help
Joanne
 

arbolis

PHF Hall of Fame
Apr 2008
815
287
Hello,
Need help on how to set this up and the answer, so I can study it to understand it.

A shaft whose diameter is 10 cm rotates with an angular speed of 1.00 rad / second. Calculate the angular displacement IN RADIANS, if the shaft rotates for 3.75 seconds??

PLEASE HELP STUCK ON THIS>
I know you convert the diam which comes to 0.05 m for RADIUS
But don't know which formula to use tho??

THANKS for your help
Joanne
The answer is pretty straightforward. I'm not sure what you're trying to do with finding the radius.
Each second, the shaft rotates by 1 rad. After n seconds, how many radians will the shaft rotate? Answer this and replace n by 3.75 to reach the answer.