To find Angular Displacement

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??

I know you convert the diam which comes to 0.05 m for RADIUS
But don't know which formula to use tho??

Joanne

arbolis

PHF Hall of Fame
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??

I know you convert the diam which comes to 0.05 m for RADIUS
But don't know which formula to use tho??

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.