8. The motion of a race car on a linear track is shown below. velocity a) When is the car at the (m/min) starting line? 80 60 40 b) When is the car sitting still? 20 time min) . 20 C) When is the car going in the negative direction? - 40 10 20 30 40 50 d) What is the fastest speed logged? Show all work. e) What is the average acceleration of the car between 0 and 10 minutes? Show all work. 9. Use both area and equation to determine the displacement traveled in the following graph. 3 +101 Velocity (m/s) 0 2 3 4 Time (s) -101 10. Use both area and equation to determine the displacement traveled in the following graph. 16 12 Velocity (m/s) -+ 00 3 4 5 Time (s)Answers: Intro to Kinematics: 1) magnitude, magnitude, direction 2) straight line 3) Less 4) V: displacement, force, 20m/s[N], velocity, 50m[down], 9.8m/s2[down], acceleration, 10km[SW] S: 1kg, 10km/hr, distance, 200km, 5hours, 40L, mass, speed 7) change 8) 10,0,15,-5,-10,5 9)1km[N] 10)0.5m[S] 11)+3.5m 12)58m[31 WofN] or 58m[59 NofW] 13)600.km, 447[27 WofN] Velocity 4)2.7m/s[E] 5)91[W] 6)30.s 8)21m/s 9)70km/h 10)35km/h,9.6m/s 11)40.km[E] 12)+5m, +2m/s Graphing Motion: Ba) no, y-intercepts are different b) B c) A d) A has a steeper slope e) A and B are at the same position 4)2.5s,5s,20m, 10m,4m/s,2m/s 5) a) Os,32s,55s b) 15-20s c) 20-40s d) 4m/s, 5m/s e) 3m/s f)0, 3.6m/s 6. The ball doesn't move at first. Then it moves backwards and then finally stops. position thiri 7 . Time (al 8. Timeis 9. Acceleration: 5)m, s, m/s, m/s2 6)11m/s 7)7m/s 8)4.0s 12)0.82s 14)23m/s[down] 15) pos, neg, neg, pos, pos 17) a)pos, inc, pos b) neg, dec, neg c) pos, dec, neg d) neg, inc, pos 18) velocity, velocity Graphing with Acceleration: 5)12.5m/s2 6/7)parabola, linear 8)a)perhaps at 0 minutes b)0,30,55min c)30-55min d)60m/min,6m/min2 9)50m 10)50m Problem Solving 1) 77.5 m/s2 2) a=0.278m/s2 3) 1.44x105 m 4) 80.s 5)2470m 6)0.87m/s2 [opposite] 7)2.9 s 8)80s 9)1.65s 10)53.3km/h or 14.8m/s 11)115m 12)0.625h, 133km/h 13) 225m 14) 6.3m/s[right] 15)0.46m/s2 16)59m/s[down] 17)5.0m/s2 18)4.0m/s 19)250m 20)0.94m/s 21)2x105 m/s2 22)30.6m/s 23)5.0m/s1. In 2019, Sammy Miller drove a rocket powered dragster from rest to 402m (1/4 mile) in a record 3.22s. What acceleration did he experience? 2. If a car is going 100. km/hr as it passes a bystander, then passes another bystander 20.0 seconds later when it's going 120. km/hr, what is the car's average acceleration? Show all work as demonstrated in the lessons. 3. A submarine is travelling at a constant velocity of 20.0 m/s for 2.00 hours. What distance did it travel? Show all work as demonstrated in the lessons. 4. A stationary boat accelerates to 90. km/hr over 1.0 km. What is the time it takes to do this? Show all work as demonstrated in the lessons. 5. A braking train can decelerate at 0.400 m/s2. If the train is travelling at 160. km/hr and needs to plan to stop at a pick-up area. How far in advance does it need to apply the brakes? Show all work as demonstrated in the lessons.11. Provide a description of a sample situation for each of the graphs below (make sure to recognize each graph as d vs t, v vs t, or a vs t). d TTTTTT