A father took his sons to an amusement park one day. He told them to meet him at the entrance at 5:00 later that day. When the kids finally showed up at the end of the day, it was 5:30. The father said that he was angry and wouldn’t take them again for a whole month. One of the boys said, “Wait; it wasn’t our fault! We were on a roller coaster, but as we went down the first hill the engine blew out!” After thinking for a while, he grounded the boys. How did he know they were lying?
Solution
A roller coaster doesn’t have an engine. It has a special motorized track to get it up the first big hill. After that, gravity takes over and it can coast all the way to the end.
