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Need physics help please!!!?
A 58 kg skier is at the top of a slope, as shown in the illustration below. At the initial point A, the skier is h = 10.0 m vertically above the final point B.
(a) Set the zero level for gravitational potential energy at B, and find the gravitational potential energy associated with the skier at A and B. Then find the difference in potential energy between these two points.
PEA (PE at A)=_______J
PEB( PE at B)=______J
difference in PE=______J
(b) Repeat this problem with the zero level at A.
PEA=_____J
PEB=_____J
difference in PE=______J
(c) Repeat this problem with the zero level midway down the slope, at a height of 5 m.
PEA=_____J
PEB=_____J
difference in PE=______J
1 Answer
- WhomeLv 79 years agoFavorite Answer
a) PE = mgh
assume up is positive
PEA (PE at A)= 58(9.81)(10) =_5690_J
PEB( PE at B)= 58(9.81)(0) =_0_J
difference in PE = PEA - PEB =_5690_J
b)
PEA (PE at A)= 58(9.81)(0) =_0_J
PEB( PE at B)= 58(9.81)(10) =_-5690_J
difference in PE = PEA - PEB =_5690_J
c)
PEA (PE at A)= 58(9.81)(5) =_2845_J
PEB( PE at B)= 58(9.81)(5) =_-2845_J
difference in PE = PEA - PEB =_5690_J
