It is not the brakes as such, but braking, which has a number of factors. One key factor is friction between wheel and surface. Your brakes might bring your wheels to a quick standstill, but that might not stop the bike.
And the 28mph stem from the point that there are electric bikes that go up to that speed.
Yes, locking up your wheels is bad. The same is true on a car. It is good that on small mechanical systems with feedback, it is easy to not lock up the tires.
On top of that, many ebikes have regenerative breaking, which makes it easy to maintain a good speed.
It is not the brakes as such, but braking, which has a number of factors. One key factor is friction between wheel and surface. Your brakes might bring your wheels to a quick standstill, but that might not stop the bike.
And the 28mph stem from the point that there are electric bikes that go up to that speed.
Yes, locking up your wheels is bad. The same is true on a car. It is good that on small mechanical systems with feedback, it is easy to not lock up the tires.
On top of that, many ebikes have regenerative breaking, which makes it easy to maintain a good speed.