The drill bit of a variable-speed electric drill has a constant angular acceleration of 4.23 rad/s2. The initial angular speed of the bit is 7.44 rad/s. After 4.54 s, (a) what angle has the bit turned through and (b) what is the bit's angular speed?

(ps. my teacher takes off if i round at all during the problem so if you could not round while figuring out the problem that would be super helpful! thanks!)


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