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Science 1206 Review for Physics Final Worksheet #2 Note: Make sure you study your notes, terms and examples from class. This review sheet will only show a sample of possible test questions. 1. Complete the following operations and give your answers in the correct number of significant digits: a. 36.92 + 12.1 b. 400 – 1.001 c. 0.0010 x 4.61 d. 3700 ÷ 29.3 2. Convert the following measurements: a. 12 mm to m b. 3.8 m to cm c. 4.5 min to s d. 18.9 m/s to km/h e. 24 h to s 3. An athlete runs 95.0 m [W] and 81.0 m [E] to warm up. If this takes the athlete 4.40 min calculate her a. Distance b. Displacement c. Speed d. Velocity 4. How long does it take a dog to run 25.0 m if he runs at 2.3 m/s? 5. How far does a car travel in 45 min if it is moving at 71 km/h? 6. The graph below shows the motion of 2 cars. d (km) 90 80 70 Car A 60 50 40 30 Car B 20 10 t (h) 0.5 1 1.5 2 2.5 3 3.5 4 a. Calculate the velocity of each car. b. How far will Car A and Car B travel in 2 h? c. Construct a velocity versus time graph for each car. 7. On a sunny afternoon you leave your home and go for a walk. Your motion is depicted below on the position-time graph. Assume positive is North. d (m) 35 30 C D 25 20 B 15 A 10 5 t (s) 1 2 3 4 5 6 7 8 9 a. Find your velocity for each lettered segment. b. What is the total distance traveled? c. Calculate your average speed. d. What is your displacement from home? e. Calculate your average velocity. 8. A bird flies south at 8.10 m/s for 13.0 s. After realizing that he forgot his suntan lotion he turns around and flies 116 m north at 7.60 m/s. Find: a. the total distance traveled b. his speed c. the resultant displacement d. his velocity 9. A skier travels 1.80 m/s down a hill. 5.80 s late she is traveling 9.30 m/s. Calculate her acceleration 10. A rabbit speeds up at a rate of 3.70 m/s2 to flee from a wolf. If he started at 1.0 m/s and reached a velocity of 8.87 m/s, calculate the time. 11. A jogger running at 2.3 m/s [E] accelerates at 0.520 m/s2 [E] for 5.00 s. Find the final velocity of the runner. Answers 1. (a) 49.0 (b) 399 (c) 0.0046 (d) 130 2. (a) 0.12 m (b) 380 cm (c) 270 s (d) 68.0 km/h (e) 8.6 x 104 s 3. (a) 176 m (b) 14.0 m [W] (c) 0.667 m/s (d) 0.0530 m/s [W] 4. 11 s 5. 53 km 6. (a) velocity of car A = + 20.0 km/h; velocity of car B = + 15.0 km/h (b) At 2 h, Car A = 50 km; Car B = 30 km (c) For car A plot a horizontal line at 20.0 km/h for the entire 4.0 h. For car B, plot a horizontal line at 15.0 km/h for the first 3 hours only (after that time it stops) 7. (a) 7.5 m/s [N]; 0 m/s; 10 m/s [N]; 8.3 m/s [S] (b) 60 m (c) 6.7 m/s (d) + 10 m (e) + 1.1 m/s 8. (a) 221 m (b) 7.82 m/s (c) 10.7 m [N] (d) 0.379 m/s [N] 9. – 1.29 m/s2 10. 2.1 s 11. 4.9 m/s [E]