(3) Calculate the force (in N) the woman in the gure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) m=65kg (b) How much work (in J) does she do if her center of mass rises 0.180 m? |:|J (C) What is her useful power output [in W] if she does 24 push-ups in 1 min? [Should work done lowering her body he iniluded? See the discussion of useful work in Work, Energy, and Power in Humans.) |:lW