Goat97

Hi! My friends and I were having a heated debate yesterday. The question was whether when one squats is the downward force exerted on the legs (hips to feet) the same if the shoulders and arms help support the bar OR if the arms are just there to hold the bar in place? The arms holding the bar do not move they are just flexed and holding the bar off the shoulders. The distance the bar has to go down is equal to the distance the legs are going down in both problems. If there are any variables that i could have forgotten to say please add them, thanks!