You decide to ride your bike, starting from rest, you ride your bike down a long hill. You reach the bottom of the hill with a velocity of 27 m/s, and traveled a total of 150 m. How long did it take you to reach the bottom of the hill and what was your acceleration?

As newton's first law states a object in motion stays in motion

The answer is a.  i hope this

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