<p>Science 10 Name: ______</p><p>Basic Speed and Velocity: Practice Questions</p><p>Directions: Answer the questions directly on the sheet. SHOW ALL YOUR WORK!!. Make sure to include your units and direction where appropriate!</p><p>1. Rebecca was training for the Bluenose marathon by running along the Bedford Highway. When she was timed along a straightaway going directly north, she was running at a speed of 15km/hr. a. What was Rebecca’s velocity at that point in time?</p><p> b. At that pace, how long would it take her to run the marathon (42 km)?</p><p>2. The fastest speed achieved by a snail in the Guinness Gastropod Championship, held over a 330 mm course in a pub in central London is held by a snail called Archie. Archie took 2.3 minutes to cover the course. (True story!) (NOTE: there are 1000mm in 1m)</p><p> a. Determine Archie's speed in mm/min</p><p> b. Determine Archie's speed in m/s</p><p> c. Determine Archie’s speed in km/h </p><p>3. Jeff decided to try windsurfing for the first time ever. When he was finally able to stand on the board and balance, he began to sail quickly southeast towards the opposite end of the lake. When he realized he couldn’t steer very well, he had already gone 26m in only 3.7s, so he decided to make himself fall and swim back to shore. a. Calculate Jeff’s speed before he fell.</p><p> b. If Jeff has continued and decided not to make himself fall, how long would it have taken him to sail to the other side of the 340m lake (assuming he stayed at a constant velocity and did not pick up speed)?</p><p>4. In an experiment at James Cook University in Australia, a researcher put the larvae of tropical fish in a special tank to measure their swimming speeds. The best swimmer was a surgeonfish larva that maintained a 13.5 cm/s swim for an equivalent distance of 94 km without a rest. a. For how long was the larva swimming? (Remember to convert your units so they are the same!)</p><p>5. The three-toed sloth is the slowest land mammal. On the ground, the sloth moves at an average speed of 0.23 m/s. The cheetah is the fastest land mammal. A cheetah is capable of speeds up to 31 m/s for brief periods. a. If a cheetah were to run at top speed for 3.0 s, how long would it take the sloth to catch up? 6. Use the following data to make a distance vs. time graph. (5 pts) t (s) 0 1 2 3 4 5 6 7 8 9 d (m) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5</p><p>Calculate the average speed of the object. Draw two more lines on your graph. One where you’re going faster and one where you’re going slower.</p>