11) This question tells us that there is a force acting on an object. We need to find which graph would be produced by a force that isn't constant in magnitude or direction. Let's start with Newton's 2nd Law. In addition to this we will also need to know that the slope of the velocity vs. time graph will be our acceleration.
We can see that the Force is directly related to the acceleration. Remember that acceleration is the slope of our velocity graph. So, all the graphs with constant slopes will be incorrect answers. This eliminates choices A, B, C, and D, leaving us with choice E.
Answer: E
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