Aball is dropped from the top of a building. when does the ball have the least kinetic energy? (a) after it has hit the ground (b) just before it hits the ground (c) just after it is released (d) half way through the fall

A

Explanation:

I just wanted to give some proof of the answer being A. :D

(I had taken the test and gotten this question wrong.)

Sound energy is produced when an object vibrates. examples are 1- a balloon popping2-a whistle3- a waterfall

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