Homework Help: physics

Posted by Matt on Sunday, May 6, 2007 at 2:44am.

I have to build a mini solar car for a school project and i have three solar cells that i bought. whenever i hook up the solar cells i get a reading between 1.5-1.8 volts, but when i hook it up to the motor it wont start it. According to the box the motor only requires 1.5v for it to run. Its not the motor either because i hooked it up to a battery and it worked. Any Help please?? thank you

Voltage does not run a motor: current flow does. THe solar cells are generating a static voltage that cannot be sustained when the motor tries to draw current. You need more solar cells for that motor. Look at the current rating for the motor, and the cells. They have to be matched.

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