5) In the space below, sketch a graph of the velocity vs. time that corresponds to the above chart. INCREASING VELOCITY --> INCREASING TIME ---> 6) Consider a ball that is dropped from rest from a height of 1.0 meter above the floor. It starts at rest, then speeds up, suddenly reverses direction, and then slows as it rises. Suppose it bounces off the floor and rises back up to a height of 1.0 m (it is a super super- ball). Sketch x, y, Vx, and vy vs. time graphs of this motion (on a separate sheet of paper), as illustrated in the theory section of this report. 7) In the diagram below, a cart is released from rest at a distance x from the first of two photogates. The cart then rolls down the ramp through both photogates. The distance between the photogates is x2. For this problem, you may assume that the cart is frictionless and the acceleration of the cart a = g sin 0. Cart Photogate 1 X1 X2 Photogate 2 a) If x = 20 cm, x2 = : 50 cm, and 0= 20, what is the average velocity of the cart between the photogates (over the distance x2)? Page < 3 of 3 ......... b) If x is reduced to 19 cm and everything remains the same, what is the average velocity of the cart between the photogates (over the distance x2)? - ZOOM + 8) A cart is pushed up a ramp with an initial speed vo = 2.5 m/s. For this problem, you may assume that the cart is frictionless and the acceleration of the cart a = g sin 0. a) If the angle of the ramp 0= 20, what is the maximum distance d that the cart will travel up the ramp? K --------- b) If is increased to 45, what is the maximum distance d that the cart will travel up the ramp? Page 1 of 3 ZOOM UNIVERSITY PHYSICS EXP 3 - PRELAB COLLIN COLLEGE www.collin.edu/physics + K --------- PRE-LAB Instructions: Print out these pages. Feel free to refer to the lab instructions and other materials, your physics textbook, other students, etc. to help you to ponder, understand, and work out answers to the following question(s). Show your work & answers in the space(s) provided. PRE-LAB Questions: A car is driven along a straight road. Its distance relative to a cross street is graphed at right: 1) draw CIRCLES around groups of points that indicate zero velocity for the car. 2) draw PLUS symbols near points in groups that indicate a positive velocity. 3) draw MINUS symbols near points in groups that indicate a negative velocity. 4) draw BOXES around groups of points that indicate either positive or negative acceleration for the car. INCREASING DISTANCE ----> INCREASING TIME