It has been suggested, and not facetiously, that life might have originated on mars and been carried to earth when a meteor hit mars and blasted pieces of rock (perhaps containing primitive life) free of the surface. astronomers know that many martian rocks have come to earth this way. one objection to this idea is that microbes would have to undergo an enormous, lethal acceleration during the impact. let us investigate how large such an acceleration might be. to escape mars, rock fragments would have to reach its escape velocity of 5.0 km/s, and this would most likely happen over a distance of about 4.0m during the impact.

what would be the acceleration, in m/s, of such a rock fragment?

Sublimation- which change of state is shown in model

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction