Is gravity a force that can changed?

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane