ID Kinematics Homework Quiz AP Physics 1 You can use your own work on the homework problems, a printed copy of the homework problems and a calculator on the homework quiz. You cannot use notes, examples, books, phones, tablets, equation sheets, or each other. When you finish the quiz, staple your homework to the BACK of the quiz and check to be sure you have included correct units and directions for final answers that require them before you turn in the quiz! 1. A cart moves according to the v vs t graph to the right. Suppose the cart starts at x = 0 at t = 0 s, and Velocity (m/s) moves in a straight line running east/west. We will consider EAST as the positive direction and WEST 25 as the negative direction for this graph. a) During what time interval(s) is the car speeding 20 up? (List each interval, for example: 650 s to 680 s, 910 s to 920 s) 15 0 to 2's and 10 200 + 0 225 b) During what time interval(s) is the car slowing 25 50 75 100 /125 175 200 25 Time (s) down? 30 +0 75 V -5 10 100 to 125 -15 150 +0 175 k -20 c) What is the car's average velocity for the 225 seconds shown on the graph?. Be sure to include direction! ? 20 225=089 mis east 2 / 5 X 2. Starting from your house, you run 640.00 m east at an average speed of 4.30 m/s, then run 820.00 m west at an average speed of 3.40 m/s ending at school. Calculate your (a) average speed from your house to your school and (b) average velocity from your house to your school. 820:00 a ) X Xo -/ 241. 18 mis X. = 640.00 3-40 XF = 820.00 equation B) 241. 18 mis west X 10 15 /53. Car A is heading east at 56.00 km/h and car B is going 24.00 km/h west toward car A in the opposite lane. (a) If the two cars start 18.00 km apart, how much time passes before the cars pass beside each other? (b) Which car has traveled farther in this time and how much farther has it traveled? 56 km/h 24kmih carA carB 18.00 km a ) ?= 3 11 6 ) 56 = 2 8 = 3.11 ? 24 = 1. 33 18 Car A traveled 1. 18 umin Farther in this time ? 0 .5 / 4 then car B. 4. A parachutist descending at a speed of 16.00 m/s loses a shoe at an altitude of 40.00 m. (a) When does the shoe reach the ground? (b) What is the velocity of the shoe just before it hits the ground? a ) so.oo -40.00 - 1.81