Adentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.50 × 10 4 1.50×104 rad/s to an angular speed of 3.35 × 10 4 3.35×104 rad/s. in the process, the bit turns through 2.02 × 10 4 2.02×104 rad. assuming a constant angular acceleration, how long would it take the bit to reach its maximum speed of 6.90 × 10 4 6.90×104 rad/s, starting from rest?

0.32 s

Explanation:

Initial angular speed:

Final angular speed:

Angular rotation:

The angular acceleration of the drill can be found by using the equation:

Re-arranging it, we find , the angular acceleration:

Now we want to know the time t the drill takes to accelerate from

to

This can be found by using the equation

where is the angular acceleration we found previously. Solving for t,

explanation:

newton's third law, for every action there is an equal and opposite reaction.

report!

explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."