Answer:
[tex]ME=459,364J[/tex]
Explanation:
Mechanical Energy=Potential Energy+ kinetic Energy
[tex]m=82kg,g=9.8N/kg,h=490m,v=40m/s[/tex]
To calculate Kinetic Energy:-
[tex]KE=\frac{1}[2}mv^2\\=\frac{1}{2}\times82kg \times(40m/s)^2\\=65600J[/tex]
To calculate Potential Energy:-
[tex]PE=mgh\\=82kg \times9.8N/kg \times490\\=393764[/tex]
therefore,
[tex]ME=KE+PE\\=65600+393764\\=459364J[/tex]
The skydiver's total mechanical energy is 459365J
