An electric car is designed to run off a bank of 12-V batteries with total energy storage of 6.0 *10⁷ J. If the electric motor draws 6000 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) 150 km B) 50 km C) 100 km D) 25 km

Question

Quizplus · Accepted Answer

The total energy storage is 6.0 x 10^7 J. The power drawn by the motor is 6000 W, which means it uses 6000 J/s. The time it can run is 6.0 x 10^7 J / 6000 J/s = 10,000 s. At a speed of 10 m/s, the distance covered is 10 m/s * 10,000 s = 100,000 m, or 100 km.

An Electric Car Is Designed to Run Off a Bank