Question

while putting in a new ceiling, jake uses a drill to put screws into the drywall. the screws rotate clockwise as they go into the ceiling. what is the direction of the angular velocity of the screw as the drill drives it into the ceiling?
a. right
b. up
c. down
d. left

Explanation:

To determine the direction of angular velocity, we use the right - hand rule. For a clockwise rotation (as viewed from above the screw going into the ceiling), if we curl the fingers of our right hand in the clockwise direction, the thumb points in the direction of the angular velocity vector. When the screw rotates clockwise as it goes into the ceiling (assuming the ceiling is above, looking down at the screw's rotation), the angular velocity direction is down.

Answer:

C. down