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

1)A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.30 × 104 rad/s to an angular speed of 3.14 × 104 rad/s. In the process, the bit turns through 1.94 × 104 rad. Assuming a constant angular acceleration, how long would it take the bit to reach its maximum speed of 7.85 × 104 rad/s, starting from rest?

2)It takes a force of 80.0 N to compress the spring of a toy popgun 0.15 m to "load" a 0.15 kg ball. With what speed will the ball leave the gun?

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