A small railroad engine is able to exert a 17,500 lb pulling force. The coefficient of friction for steel wheels on steel rail is 0.40. How many rail cars weighing 45,000 lb each can this engine pull on level track?
2 answers
force needed per car = 0.40 (Typo ??) * 45,000 (Typo ? ) = 18,000
By the way most wheels can roll.
1 answer