8. A crate of bananas weighing 3000 N is shipped from South America to New York, where it is unloaded by a dock worker. The worker lifts the crate by pulling with a force of 200 Non
the rope of a pulley system. What is the mechanical advantage of the pulley system?
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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 

The geological theory that states that pieces of earth's lithosphere are in constant slow motion is the theory of plate tectonics.