The DeLorean featured in the movie is an actual car, made by John DeLorean. He h

Question

The DeLorean featured in the movie is an actual car, made by John DeLorean. He had originally envisioned the car would produce 200 horsepower, but eventually settled on 170 horsepower output for the engine. In the United States, the vehicles were required to have catalytic converters, causing a 40 horsepower reduction in output power. If the DeLorean requires 850 kilojoules to reach a speed of 60 miles per hour, how much longer does a US model take to reach 60 mph than its European counterpart?

6.7 seconds

2 seconds

1.25 seconds

14 seconds

8.7 seconds

Explanation / Answer

We know

1HP=746W

Also Energy= P*t

DeLorean took t seconds to reach 60mph

t= E/P=850*103/170*746=6.7s

US model has a power of 130HP

Time taken by it will be

t'=850*103/130*746=8.7s

Hence US model takes 2 seconds longer than European counterpart to reach 60mph

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