The engine in an imaginary sports car can provide constant power to the wheels o

Question

The engine in an imaginary sports car can provide constant power to the wheels over a range of speeds from 0 to 70 miles per hour (mph). At full power, the car can accelerate from zero to 32.0 mph in time 1.50 s .

A more realistic car would cause the wheels to spin in a manner that would result in the ground pushing it forward with a constant force (in contrast to the constant power in Part A). If such a sports car went from zero to 32.0 mph in time 1.50 s , how long would it take to go from zero to 64.0 mph ?

Explanation / Answer

in 1.5 s it goes to 32 mph

So to reach 1 mph it take 1.5/32 sec

hence to reach 64 mph it take 1.5*64/32 = 3 sec Answer

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