Recent content by larry1990

My table does account for rolling resistance. I've used the rolling resistance of rubber on grass (0.06).

Are you telling me that at a net force of 0 N, the bike won't travel at a constant speed? If I wasn't confused on it, I wouldn't be asking. I Know I've done something wrong, I'm asking for some guidance on how to rectify it.

Hey Billy_Joule. Newtons laws tell us we can travel at constant velocity when the net force is zero. The 2.89m/s is a specified constant velocity. I used the power from my table showing the amount of power required to travel up various degrees of incline at a constant speed of 2.235m/s, and...

Thanks for your response. ...If you think about it in a practical sense, moving on a flat surface with a constant 152W of power for a constant velocity of 2.89m/s, then climbing an incline without adjusting anything yourself, the speed will reduce to a new constant velocity. Increasing the...

For the forces on the bicycle, and verification of power required at different angles to achieve a constant velocity: http://prntscr.com/a7ghpp For the friction wheel diameter: I assumed the wheel will rotate at the same rpm as the motor shaft (since it's attached t the motor), and assumed it...

Hey guys, I'm having difficulty with my university project which is to build an electric bike. My design is to have a friction wheel attached to the shaft of my 800W 2800rpm electric motor which is rated at 2.8Nm. I have two issues with my spreadsheets at the moment. Can someone please help...