A box weighing 10 kg rests on an inclined plane of 35 degrees. A force of 25 newtons pushes the box up the inclined plane. What is the force of friction acting on the box and what is the normal force that the plane exerts on the box?

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 

Newton's first law describes something special that results from the sum of all the external forces (including gravity) on an object.