I need to buy a DC motor for an electric skateboard project. I need to calculate the speed at which it can travel with a person on top. I can calculate the speed at which the skateboard can go but is does not account for the weight of a person as that will surely decrease the speed. What formula can be used to calculate the speed with for say a 120kg person standing on the skateboard. The skateboard can go at a speed of 21mph how much will it decrease due to a person's weight? Any known formulas?(adsbygoogle = window.adsbygoogle || []).push({});

Also, what formula can I use to calculate the speed on an incline?

Please help me out.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Calculating the speed taking into account the weight of a person

**Physics Forums | Science Articles, Homework Help, Discussion**