AP Physics 1 Motion in One Dimension Practice Test {Free Response Section SOLUTIONS) Problem 1 (7' Points) (Teacher Made) (a) 3 points I] The elevator is moving upvvard. I] The elevator's positive acceleration before t= 12 seconds gives it upward motion. I] The elevator's speed is 10 nus (this is found by taking the area of the positive acceleration). (b) 2 points I] The elevator is at rest. I] The elevator's negative acceleration cancels its positive acceleration. (c) 2 points I] The elevator is above its initial position. I] When the elevator was moving, it only had positive (upward) velocity