What does the word nemvrametio mean

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?

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Decreased sensitivity to an unchanging stimulus is known as