1. The problem statement, all variables and given/known data A 12V car battery is capable of storing 3.51 kWh of electric energy. For a certain electric car to maintain a speed of 48.3 km/hr, it must develop 10.7 kW of power. If this car is run by 11 batteries which are 90.5% efficient, how far can this car travel, at the desired speed, between recharges? V= 48.3 m/s (yes constant motion) P=10700W efficiency= 90.5% Each battery capacity= 3510W Uses 11 batteries 2. Relevant equations E= (Wo / Wi ) *100 E= .5 * m * v^2 W= P*t 3. The attempt at a solution 1. Since its going at a constant velocity, i can find the mass. Using the Energy kinetic formula. 2.Finding the mass i can plug it into the efficiency formula to get its work output. 3. its using 11 batteries that are 90.5% efficient. So on the denominator of the efficiency formula it would be 11* 3510W because each capacity is 3.51kWh. 5.the numerator would be the Energy kinetic formula * 100 and then the efficiency would be 90.5% 6. Getting the time i could multiply it with the velocity to get its distance?