Two objects have masses m and 5m, respectively. They both are placed side by side on a frictionless inclined ramp and allowed to slide down from rest without any air resistance. Which one of the following statements about these objects is correct?

a) The two objects reach the bottom of the ramp at exactly the same time.
b) It takes the heavier object 5 times longer to reach the bottom of the ramp than the lighter.
c) It takes the lighter object 10 times longer to reach the bottom of the ramp than the heavier.
d) It takes the heavier object 10 times longer to reach the bottom of the ramp than the lighter.
e) It takes the lighter object 5 times longer to reach the bottom of the ramp than the heavier

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 

It really doesn't matter for any of the questions that you've listed.