Which of the following is not a function of a simple machine?

*increase energy.
*change direction of force.
*change the distance the force acts through.
*multiply force.

If the moon has a diameter of 2,159.14 miles, what is the maximum distance that it could be observed by the naked eye with enough detail that you could distinguish it from other celestial bodies (assuming that you have 20/20 vision)

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1