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Formulas to use with this quiz. Speed= distance time Force= M X A Acceleration= v final - v initial time 1. 8.6b You would know an object moved if A. it had speed B. it accelerated C. its position changed D. all of these 2. 8.6b Which of the following does not change an objects acceleration? A. change direction B. slows down C. constant velocity D. speeds up 3. 6.8b Equal forces that do not cause a change in motion are considered A. balanced B. unbalanced C. inertia D. friction 4. 6.8d and 8.2eThe graph below shows the distance a studenttraveled over time in the hall. What was the average speed of the student from 15 seconds to 30 seconds? 150 m/s 4 m/s 1 m/s 15 m/s Use this graph to answer the next question. B. Between the 2nd and 3rd hour of the ride the cyclist traveled 30km. C. The fastest speed of the cyclist was in the last hour of the ride. A. The cyclist traveled at a constant speed throughout the ride. D. The average speed of the cyclist is in the first 2 hours was 15 km/h. 5. 6.8d and 8.2e The graph on the previous slideshows the distance and time a cyclist traveledduring a 4 hour trip. Which of the following statements is true based on the graph? D. Bob traveled at a constant rate of speed during the race. B. Bob won the race when he took a shortcut. C. Bob was speeding up during the race. A. Bob lost the race. 6. 6.8d and 8.2e Which description best describes Bob's motion in the graph? 7. 8.6a Calculate the acceleration of the block if aforce of 20 newtons is applied. 4 m/s2 15 m/s2 20 N 100 m/s2 25 m/s2 5 kg Calculate the velocity of a car that travels 558 km northeast in 4.5 hours. 2511 km/h 124 km/h 8. 8.6 a 145 km/h 12.4 km/h 10. 6.8c A helicopter’s speed increases from15 m/s to 60 m/s in 5 seconds. Whatis the acceleration of this helicopter? 15 m/s2 45 m/s2 180 m/s2 9 m/s2 |