A 2kg flat disc with radius 1m and moving at 2 m/s accelerates to 4 m/s. How much work was done to it? The moment of Inertia for a flat disc is
1=1/2mr^2

Iwannasay c is the most accurate

Global warming was a major concern some people do not care global warming is fake it is not real the percentage of it happening  is slight 

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