Still, if the fan speed is below the design value, then some current is drawn from the battery to attain the designed speed. Resistance (R) helps in pushing back the battery current by increasing the ...

Learn about Newton’s three laws, terminal velocity, contact and non-contact forces and free body diagrams with GCSE Bitesize Physics.

Power is the most important thing in road bicycle racing like the Tour de France. If you want to move along on a bike at a constant speed, you have to use energy. There are no free rides. But ...