Which of the following describes the mechanical advantage of a compound machine?

What is the rate of change in a objects position?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?