Wednesday

January 28, 2015

January 28, 2015

Posted by **Sam** on Tuesday, October 23, 2012 at 8:38am.

- Physics -
**Jennifer**, Tuesday, October 23, 2012 at 10:25amw = w0 + a*t

theta = w0*t + 1/2*a*t^2

where w is the angular speed, w0 is the initial angular speed, and a is the angular acceleration, and theta is the angle turned in radians, so

3.14*10^4 = 1.2*10^4 + a *t

1.92*10^4 = 1.2*10^4*t + .5*a*t^2

Solve this system of equations using algebra for a and t

Then, use

7.85*10^4 = 1.2*10^4 + a*t,

where you know a from before, and you now solve for time

**Answer this Question**

**Related Questions**

Physics(Please help) - A dentist causes the bit of a high-speed drill to ...

physics - A dentist causes the bit of a high-speed drill to accelerate from an ...

Physics - A dentist causes the bit of a high-speed drill to accelerate from an ...

Physics - Your electric drill rotates initially at 5.11 rad/s. You slide the ...

physics - A machine part rotates at an angular speed of 0.38 rad/s; its speed is...

physics - A dentist's drill starts from rest. After 2.50 s of constant angular ...

Physics - A dentist's drill starts from rest. After 3.30 s of constant angular ...

Physics - A dentist's drill starts from rest. After 3.30 s of constant angular ...

Physics - A bicycle starts at the origin of a circular track that has a ...

physics - A disk rotates about its central axis starting from rest and ...