Which vector best represents the net force acting on the +3C charge in the diagram

What kind of simple machine is a catapult?

Which of the following list the divisions of the geologic time scale in order from longest to shortest

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.