Ok, heres the deal, this is a physics problem that might seem basic to you. But to me its a pain, Ive been working on this problem for 2 days now, and my group members are of no assistance to me. They have different answers than i do which i didn't agree to. The question Jessica runs up a 5 meter high stair to get to class on time. Her mass is 55kg and it takes her 10 seconds to run up the stairs. A. What is her force? B. How much work does she do? C. How much power does she produce? Heres the work that i have already put into and i am not sure if I am wrong or not. Force- since F=m*a (due to gravity) i took 55kg multiplied to 10m/s2. Since gravity pulls at roughly 9.8m/s2 -> i round to 10m/s2 55kg*10m/s2 = 550kg m/s2 (And i said that kg m/s2 is=to (Newtons) So my force is 550N Work- since W=F*d I took my force 550N and multiplied to 5m. N*m = Joules 550N*5m = 2750 J So my work is 2750J Power- since P=w/t I took my work 2750J and divide by my time 10sec. work/time=watts 2750J/10s = 275watts So my power is 275Watts I am not sure that these are correct but its been killing me for 2 days just thinking about it. And i know you guys out there can help.