Question

In a particular LEGO kit, a capacitor with a capacitance of 0.400 farads is charged by a solar cell. The solar cell produces a potential difference of 5.00 volts across the capacitor. The capacitor is then disconnected from the solar cell and connected to the motor of a small LEGO car. The car has a total mass (including the capacitor) of 290 grams. Assuming that 60% of the energy stored in the capacitor gets converted into the car's kinetic energy, what is the maximum speed reached by the car? Assume the car starts from rest, and travels on a flat floor.

Answer 1