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Name, _ Period Date Chapter 2: Motion 2-1 1. Table I shows data of sprinting speeds of ANIMAL {DISTANCE TIME SPEED some animals. Make whatever CHEETAH 75m computations are necessary to complete | GREYHOUND |. 160m de Ys the table io yt GAZELLE | 1 km | oo. cine | 0 kmn Tale I TURTLE 20 ey 30s | tems we . A BB held at rest 16 cm above a desktop is dropped and falls to the desk below. The total time of fall is divided into four equal time units. The position at the start and end of each time unit is shown full scale in Figure 1. Q_ START “a. Why is the spacing of the BB farther apart with each successive time unit? UR t ae . fia Ven irnyel i ei % - yy 6ae ; b. With a ruler, measure the successive distances from the starting point in Fain ! centimeters, and place the values in the empty places. Do you see a square i Siam relation between time and distance? * 1 i ttt had -——— o * Record Table I ~. ¢« Record your measurements he ||| 17 © inTablelt Gehich is similar to [ELAPSED TIME (UNITS) DISTANCE FALLEN (cr) Few | Table 2-3 on page 20 in your ! textbook.) Distance is in o 0 I centimeters and time is in our { i special unit (actually 0.045 ; second). 2 Ye 3 4 t | d. With a ruler, measure the a 1G 1 i distances between successive . i i ositions of the falling BB o & the distances failen during Table IT e each time unit), and record ' \ them in Table II. Do you see UNIT- TIME INTERVAL ane rae IW ! IG@cm anodd-integer pattern? Ifthe |- UNIT OF TIME Cm) 1 } table were to continue, predict 4st | 1 i the next 3 falling distances. ' 4 gud a t \ 3re & t ot Ath “y. ! j e. For an object falling from rest, total distance matches the of the : i total time, and the distances fallen during successive time units match the I : sequence of + numbers. \ i END Y* Figure t Cesk Conceptual Physics: Concept-Development Exercises © Addison-Wesley Publishing Company, Inc. All rights reserved. Exercise2-1 3 
