An electric car is designed to run off a bank of 12-V batteries with total energy storage of 3.0 ´ 10⁷ J.If the electric motor draws 6 000 W in moving the car at a steady speed of 10 m/s,how far will the car go before it is "out of juice?" A)25 km B)50 km C)100 km D)150 km

Question

Quizplus · Accepted Answer

The total energy available is 3.0 x 10^7 J. The power consumption is 6000 W, which means the car uses 6000 J of energy per second. The time it can run is 3.0 x 10^7 J / 6000 J/s = 5000 s. At a speed of 10 m/s, the distance covered is 10 m/s * 5000 s = 50,000 m, which is 50 km.

An Electric Car Is Designed to Run Off a Bank