2. How can you tell from your velocity graph that the cart is moving away from the detector? The velocity is positive labove the x-as) 3. How can you tell from your velocity graph that the cart is speeding up? How would the graph look different for constant velocity motion? When the cart speeds up ;velocity increased in the positive direction. meade 4. Is the slope of the velocity vs. time graph positive or negative? 5. Is the value of the acceleration positive or negative? Predictions 6. Suppose you replaced the 20 gram hanging mass with two 20 gram hanging masses. How do you think this will affect the acceleration? 7. How do you think the velocity vs. time and acceleration vs. time graphs will look different