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PROBLEMS and QUESTIONS 1. An object moves across the floor and comes to a stop. Explain how Aristotle and Galileo would view this motion differently. 2. Explain the difference between speed and velocity and give examples of each. 3. Explain how an object can have a constant speed and a varying velocity. 4. What are the units of acceleration? 5. If an automobile travels at the rate of 40 miles per hour, how long will it take to travel 400 miles? 6. A car travels at the rate of 40 mph for 3 hours. What distance does it travel? 7. A car travels 4 a miles in 114 hour. What is the average speed? 8. A car is moving with a speed of 30 m/s (constant direction). Ten seconds later it is moving with a speed of 50 m/s. calculate the acceleration. 9. A body moves with a speed of 20 m/s and 3 seconds later it is moving in the same direction with a speed of 14 m/s. a) Is the body accelerating or decelerating? b) Calculate the value of the acceleration or deceleration. 10. A rock is dropped from a building, calculate the following: a. The distance it falls during the first second. b. The distance it falls during the 4th second. c.The total distance it falls in 5 seconds. d.The speed after 5 seconds of fall. 11. The sketch below represents the motion of an object moving along a straight line but capable of reversing its direction.
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