PHYS 101 Lecture Notes - Lecture 10: University Of Manchester
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A car moves in a circle, with constant speed. Example: my brother races a 1965 el camino on a drag strip about every other weekend. In a one race a few years ago, it took 9. 79 s to reach the finish line. He started from rest and had reached a speed of. 132. 86 mph (59. 39 m/s) at the finish line. His velocity changed by (59. 39 m/s - 0 m/s) = 59. 39 m/s in. His average acceleration is: a = (59. 39 m/s) / (9. 79 s) = 6. 07 m/s. Notice the units: m/s2 (read meters per second, per second) If an object is at rest its velocity is 0. The law of inertia for an object at rest means that: An object at rest will remain at rest if it is not subject to a net external force. If an object is moving with a constant speed in a straight line the law of inertia states that:
