Science 10 Final Exam Physics Review Part 1: Compare and Contrast 1. Uniform motion and Nonuniform motion a. Uniform motion – Motion that has a constant speed and direction (ex/ Driving down a straight highway) b. Nonuniform motion – Motion that changes speed or direction (ex/ Accelerating in your car after the light turns green) 2. Speed and velocity a. Speed – A scalar quantity that describes how fast something is going, with no concern about direction b. Velocity – A vector quantity that describes how fast something is going and in what direction 3. Average speed and instantaneous speed a. Average speed – A measure of the total distance traveled in a given length of time regardless of any changes in speed (ex/ The tortoise had a larger average speed than the hare) b. Instantaneous speed – The speed of an object at one point in time (ex/ When you look at the speedometer of your car while you’re driving) Part 2: Multiple Choice Determine what quantity is being talked about in each of the following 1. The sprinter finished the race in 10.8 seconds a. Distance b. Time c. Velocity d. Acceleration 2. Natalie jogged at 2.5 m/s a. Distance b. Time c. Velocity d. Acceleration 3. Angela ran 5.0 km from her home a. Distance b. Time c. Velocity d. Acceleration 4. John was clocked on radar at 130 km/h a. Distance b. Time c. Velocity d. Acceleration 5. The ball slowed down 3.5 m/s every second. a. Distance b. Time c. Velocity d. Acceleration 6. Kevin walked 2.5 km in 0.50 h a. Distance b. Time d. Acceleration c. Velocity 1 Science 10 Final Exam Physics Review 7. Chan flew from Regina to Singapore in 27 hours a. Distance b. Time c. Velocity d. Acceleration 8. The coin fell at 9.81 m/s2 a. Distance b. Time d. Acceleration c. Velocity 9. How far from Regina would you be (in kilometres) if you cycled at 9.0 m/s for 30 minutes? a. 0.27 km b. 16 km c. 24 km d. none of the above 10. Which of the following measurements are needed to find the acceleration of an object? a. Average distance and average time b. Total distance and total time c. Total velocity and total time d. Initial velocity, final velocity and time Part 3: Interpretation of Graphs Describe what is happening in each of the graphs below. Use terms such as contant speed, stationary, deceleration and acceleration 2 Science 10 Final Exam Physics Review Part 4: Short Answer 1. How long would it take Jim to walk 10,000 metres if he crawls at a rate of 3.62 km/hr? (1 km = 1000 m) d = 10,000m v = 3.62km/hr t=? 𝑡= 𝑑 10𝑘𝑚 = = 2.76 ℎ𝑟 𝑣 3.62𝑘𝑚/ℎ𝑟 2. Carol and Cheryl race to Moose Jaw. Carol drives her car at a rate of 150 km/hr to Moose Jaw, which is 75 km, away. However, she has to stop for 15 minutes while she gets a speeding ticket. Cheryl drives at a constant rate of 120 km/hr. a. Who gets to Moose Jaw first? Carol v = 150km/hr d = 75 km t =? + 15 min Cheryl v = 120km/hr d = 75 km t=? 𝑡= 𝑑 75𝑘𝑚 = + 15𝑚𝑖𝑛 = 0.5ℎ𝑟 + 15 min = 30 min +15 min = 45 𝑚𝑖𝑛 𝑣 150𝑘𝑚/ℎ𝑟 𝑡= 𝑑 75𝑘𝑚 = = 0.625ℎ𝑟 = 37.5𝑚𝑖𝑛 𝑣 120𝑘𝑚/ℎ𝑟 Cheryl wins! b. By what length of time does she win the race? 45minutes – 37.5 minutes = 7.5 minutes c. BONUS: How far has the loser gone by the time the winner finishes the race. v = 150km/hr= 2.5km/min t = 37.5 min - 15min = 22.5min d=? 𝑑 = 𝑣 × 𝑡 = 2.5𝑘𝑚/𝑚𝑖𝑛 × 22.5𝑚𝑖𝑛 = 56.25𝑘𝑚 3. Construct ONE distance vs time graph based on the following runners data: Interval distance of Runner 1 (m) 0 30 60 90 120 150 Total Distance of Runner 2 (m) 0 10 20 50 90 150 Time (s) 0 4 8 12 16 20 3 Science 10 Final Exam Physics Review a. What type of motion is occurring in each graph? a. Runner 1 Uniform motion b. Runner 2 Nonuniform motion b. Based on the data, what is the average speed of each runner? a. Both have an average speed of: 𝑣 = 𝑑 𝑡 = 150𝑚 20𝑠 = 7.5𝑚/𝑠 c. Using your knowledge of slope’s relationship to velocity, who was running faster at a. 5 seconds? Runner 1 (Greater slope at 5 seconds) b. 15 seconds? Runner 2 (Greater slope at 15 seconds) d. If the race was 200m long, who do you think would win? Explain a. Runner 2 would win because Runner 2 is getting faster and faster [since her slope is increasing with time (probably due to getting an arrow to the knee)], whereas Runner 1 is running at a constant rate 4