Does it take more friction to stop a car using emergency brakes or regular brake?

In order to stop a car using ONLY the emergency brake, roughly 4 times the force would have to be applied to the emergency brake system that the normal brake system. This is because the emergency brake only activates one to two pads in the rear of the vehicle, where as the normal brake system activates ALL the pads on every wheel. Emergency brakes are NOT designed to stop a moving vehicle, they are designed to hold a stopped vehicle in place.