A bomb with 8 x 10 with the power of 4 J of potential energy explodes. Assume 20 percent of its potential energy is converted to the kinetic energy of the metal pieces flying outward (shrapnel). The total kinetic energy is 1.6 x 10 to the power of 4 J. Assume the average mass of the shrapnel is 0.4 kg and that there are 200 pieces. What is the average speed of one piece?

The answer is 12, for the points

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