| Arnold was driving down US 41.5 in his 1999 Whizzer when he spotted a strange object in the sky. "Gee," said Arnold, "If I were the first to greet these aliens, I'd be famous!" Unfortunately, Arnold should have been thinking more about his driving, because his 3000-kg car, which was traveling at 20 m/s, slammed into a telephone pole. The distance it took for the car to stop was only 3 meters.
Let's see if you know the meaning of work! What was the magnitude of the average force that stopped Arnold (and his car)? |
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