52: In general, during the time a single force with a constant strength acts on a moving object in the same direction as its motion, what is the object's motion like? Does it move at a constant speed, does its speed continuously increase, or does the speed only increase at rst and then become constant after a short time? What evidence from this activity supports your thinking? 53: When you were using your nger to try to push the cart with a constant strength force, you probably noticed the cart was 'getting away' from you. (If not, try it again.) Why do you think the cart behaved in this way? 54: Suppose that, while the cart was being pushed along the track by the fan unit, one of the fan blades jammed so that the fan unit immediately stopped pushing on the cart. Based on your collected evidence, what do you think would happen to the speed of the cart? Explain your reasoning