Braking systems on cars

I thought of a maths problem for myself to solve, as it seemed like a good problem to try to get my head around. My issue is that I got stuck at the first hurdle. I was reading up about the braking systems on f1 cars and it said they the drivers put around 1500N of force through the brake pedal, and the coefficient of friction between the brake pads was about 0.6 at optimum temperature. I would have thought that this would have then given the car a decelerative force of 900N. f1 cars weigh 700kg, so this would give a deceleration of 1.28ms^-2. This is very far from the real value, as f1 cars decelerate at up to 5g, which is 49ms^-2. Can anybody figure out where I have gone wrong as I have been thinking about it for well over an hour by now.

• Is it 1500N through the brake pedal or per pad? (You would be off by a factor or 10 instead of 40... :) ) – Matt Jun 27 at 21:52
• 1500N through the brake pedal, I have also realised where I have gone wrong as I didn't take into account for the moments in the wheels. I am having another approach st it using the energy equations. – finlay morrison Jun 27 at 21:57
• Have you included the brake disc diameter? – user207455 Jun 27 at 21:58
• yea I have got to this point atm "braking power = (FxV)/D" where 'f' is the force at the pedal, 'x' is the diameter of the brake disk, 'v' is the velocity of the car and 'D' is the wheel diameter – finlay morrison Jun 27 at 22:05