In April John Massis of Belgium managed to move two passenger railroad cars He did so by clamping h
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- เผยแพร่เมื่อ 19 ก.ย. 2024
- In April John Massis of Belgium managed to move two passenger railroad cars. He did so by clamping his teeth down on a bit that was attached to the cars with a rope and then leaning backward while pressing his feet against the railway ties. The cars together weighed 700 (about 80 tons). Assume that he pulled with a constant force that was 2.5 times his body weight, at an upward angle of from the horizontal. His mass was 80 , and he moved the cars by 1.0 Neglecting any retarding force from the wheel rotation, find the speed of the cars at the end of the pull.
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