car travels on a straight, level road. (a) Starting from rest, the car is going 54 ft/s (37 mi/h) at the end of 4.0 s. What is the car's average acceleration in ft/s2? magnitude      13.5 ft/s2     (b) In 3.0 more seconds, the car is going 108 ft/s (74 mi/h). What is the car's average acceleration for this time period? magnitude     18  ft/s2     (c) The car then slows to 81 ft/s (55 mi/h) in 2.0 s. What is the average acceleration for this time period? magnitude       ????? ft/s2

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Distance and Speed

The speed, distance and time relation forms the basis of study of motion. You will need these concepts in the study of Mechanics. This concept is applicable for students who are studying the following courses –