An angry mob lynches a phsical teacher after receiving their grades. they throw the physics teacher off a tall building . they throw the physics teacher straight down with a velocity of 20m/s. the teacher falls for 30 seconds before landing on a stack of empty card board boxes . how high was he thrown from?

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