Astudent is walking along the hallway at 1m/s when the bell rings for class. the student reaches their classes their classroom door in 10 seconds ,now moving at 3m/s. how much did they accelerate

Because its reliable.   there is no pollution  the chances of a radiation leak is low

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