The leg that exerts greater pressure on the ground is the leg that is wearing the slippers. It is because as you wear the heels on the other leg, it will not exert more pressure compared to the other leg that is wearing the slippers for the slippers exerts effort as it is contacted to the ground with the leg standing uprightly than the heels that makes the leg fold, creating less contact to the ground. As you exert force in contacting to the ground, the greater the pressure you insert.
