Answer:
Potential energy = 261.633 kJ
Explanation:
The potential energy is the energy stored in an object due to its position above Earth's surface.
The potential energy formula is :
[tex]E_{p} =m.g.h[/tex]
Where [tex]E_{p}[/tex] is the potential energy
m is the object mass
g is the gravity
and h is the height referred to a comparison plane
We start by converting the height in feets to meters
[tex]h=1250ft=1250ft.\frac{0.3048m}{1ft} =381m\\h=381m[/tex]
[tex]m=70kg[/tex]
and
[tex]g=9.81\frac{m}{s^{2} }[/tex]
[tex]E_{p} =(70kg).(9.81\frac{m}{s^{2} } )(381m)=261632.7 kg.\frac{m}{s^{2} } .m[/tex]
Where
[tex]kg.\frac{m}{s^{2} } =N[/tex]
N is Newton
[tex]N.m=J[/tex]
J is Joule. Joule is the energy unit
[tex]E_{p} =261632.7 J[/tex]
We divide it by 1000 to obtain kJ
[tex]261632.7 \frac{J}{1000} =261.633 kJ[/tex]
