科研之友
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<正>John Metric was shocked the first time he drove his electric dragster, a modified 1984 Pontiac Fiero(Fig. 1). Metric had swapped the car’s gasoline engine for two electric motors that could generate 1830 N·m of torque. When he hit the accelerator,“it threw me back in my seat so hard,” he said. Reaching 97 km·h-1 in just over 2 s, the car produced such strong g-forces as it accelerated that “I had tunnel vision” and almost blacked out, said Metric,
