name:_Lita , Clin, SPH3U Unit 1 test Kinematics Knowledge/Understanding Communication Application Thinking/Inquiry Total “10 wb 720 10 /45 Knowledge and understanding:[10 marks] Multiple choice: 1, The following velocity-time graph depicts the motions of two objects, A and B. Which of the statements describing the graph is true? @aocD Both objects are accelerating uniformly. The two objects are travelling in opposite directions. Both objects start from rest. Object A travels farther than object B. Object B travels farther than object A Velocity vs. Time 2. An 80.4-km trip takes a time of 0.75 h to complete. The average speed, expressed in the correct manner, is a. 107.2 km/h b. 1.072 x 10? km/h c. 29.8 mis d. 1x10? km/h e@. 1.1.x 10? km/h 3. The position-time graph pictured below represents a race between three contestants A, B, and C. The race begins at time zero at the sound of the starter's pistol. Which of the following statements is true? ea9c8 The runner who started last finished first. The fastest runner won the race. The runner with a head start won the race. ‘Only one runner began at the sound of the starter’s pistol. Alll runners ran the same distance. Position vs. TimeName:, A 4. A vacationer, on her newly purchased sailboat, moves at a constant velocity of 9.0 m/s [south] for 35 min and then returns in the opposite direction at a velocity of 4.0 m/s in 45, min. The average velocity of the sailor for this trip is a. 1.7 mis [south] b. 6.9 mis [south] c. 5.0 mis [south] d. 13 mis [south] e. 10 mis [south] g 5. Which of the following statements concerning vector and scalar quantities is incorrect? a. All scalar quantities have direction b. All vector quantities have direction . All scalar quantities have magnitude d. All vector quantities have magnitude e. All of the above statements are correct C 6 Pamela swims at 2.8m/s relative to the water, heading west. The current flows south at 1.2mis. Find Pamela's resultant direction. a. 25° S of W b. 28°S of W 6.237 S of W d. 23° N of W e. 25° N of W A 7. A projectile is launched over level ground with a speed of 240m/s at 35° to the horizontal. If friction is negligible, what is the height of the projectile 17s after launch? a.9.2x10°m b. 1.9x10°m ©. 2.7 x 10°m d. 5.5 x 10°m €.9.8x10°m & 8. Which one of the following statements correctly describes the motion of an object depicted by the velocity-time graph? a. the object is moving at a constant velocity v b. the object is slowing down only c. the object is moving in the negative direction d. the acceleration of the object is zero e. the acceleration of the object is a negative constant valueName: A 9. The slope of a tangent line drawn at 45 s would represent a. The stantaneous acceleration . The average velocity c. The instantaneous velocity d. The displacement e. The average acceleration 10. A.400-m, 800-m, and 1600-m race are all run around the same 400-m oval track. The winning times forthe races were 50 s, 2 min, and 4 min 10 s respectively. Which of the following statements is true? : a. All runners have the same average velocity: b. The 400-m runner has the greatest average velocity. ©. The 800-m runner has the greatest average velocity. d. The 1600-m runner has the greatest average velocity. e. All runners have the same average speedName: Application:{20 marks] 1) From the given velocity time graph, a) construct the displacement-time from 30-60 seconds b) And the Sete Graph from 30-60 seconds. Que eh disqerewone J lows)(l05) + dows) 8) F J f loys) (09) 290 Floo | (e985, thm) = -4oom, Bo yee at 12385 ot Bo] (5205, 0%) £9) — doom pasicion fon ™ ~2p0 Wut f= Se S05, - 3 ace See) >4o0r ~ od oo at + 2905, Veludleot Loom 1 (Gas, “foom) gested thers aig Velocity vs. Time velade - 0 Bos, IM nesceve | Sooo divin s & = Bros, 4 postive * los, ge dieion 3 a @, ot t=608, ) $5 : =(v0 + BBW) ((o408 * ASW) WY ayn, at 2&5, vehicle ot nel (ayn pssidion , § fe tio to Ps, gg GES) ae (Sel Ls £2 HS & boS mgh 7h Ge -(6S4Y5>Name: 2) From the given graph above: (make sure to provide the formula for each solution) a) What is the object's total distance from 30-60 seconds? [3 marks] Use 3 significant digits for answer. at 205, Velde at - Goom postabv, ) ieee tee at Ses, Vehide at ~ (ob position t ddione =228™ , at G05. gehen [2Ta pesrtron 2 ddiene sere teal dBone = Boot 227 > T3Yon, +b) What is the object's displacement from 30-605? [3 marks] Use 3 significant digits for answer. Stylorenene = end pasicion ~ sfove positrin (23m - (-4o0m) = Jaw, ( GSpbcemors =hqm, ©) What was the object's average speed from | d) What was the objects average velocity from 30-605? “ 3 significant digits [1] 30-605? Use 3 significant digits{1} : {dozenon| = dhe oy valoorey =\We/s (+) 2 Lud) = sped = SE 219445, ows syed = (mls e) What was the object’s average acceleration from 20.05-50.05? Use 2 significant digits[2 marks} ng, Cian < Nin oe Bowls = Crow) 1607 waht DH oF 30.05 eh Tel sary algeloration (TimsName: Communication:[5 marks] 4. What is the difference between average velocity and instantaneous velocity? [2 marks] erage velacoy 8 the cael J Yovewone dUaled by the eh ine nes, cy oveacisy thet Ladle ot hs anstont veliicy, se cbf iki veadle athe. gre dBpbrenet urthia the sion Ae yond, ~ tnortarees Welly 3 the velay ch the obit of the. Spain Sivan Tove, 2. What is the difference between velocity and speed? [2marks] Sek x het fost the ohare S ending vec: uss ose AND tmord whith doeamin, de shire Couns, 3. What is the definition of acceleration? [1 mark] the Vote of chose 5f veloovey saith a Sher ire persd ,Name: Thinking and inquiry [10 marks] 1. A student swims in a river. When the current flows, its velocity is 1.0 m/s [E]. The student can ‘swim at 2.0 m/s (in still water). Find the swimmer’s velocity with respect to the ground when: [6 marks] a) There is no current flowing b) The current is flowing and the swimmer swims with the current, °c) The current is flowing and the swimmer swims against the current. (or) 2sovr(5 , Haba coluch ever JME Can the Sordeme Sains chy gowns LE] 5 20mS t Kom/s jan divecnion 6f caitont | dy opposite, dtvetcbe Of Gaieny C velootoy oponds 30 f yea cn VE0, the ital °° Speedy »p" ware conalled by the tev ** slasing eso" Gwidal spouditgy og 2° Low (Sap. for B08, dors slows downs om [s™ dawn for 205. fered o& 6.0 seconds & before reaching ana heist, wore ek = ((0 owls) Gas) + ital using = Se.0mls + omls = Se.0 m/s, ong waotey = Os eee Parken fated JBylatemone = (Ss wfs)(698) 2 4,0» CP] Manx reghe Veached, ts fom,