Question

I NEED HELP ASAP 1.    Suppose a skydiver (mass = 75 kg) is falling toward the Earth.  When the skydiver is 100 m above the Earth he is moving at 60 m/s.  At this point calculate the skydiver’s……. a.    (2 pts.) Gravitational potential energy
           
b.    (2 pts.) Kinetic energy            
c.    (2 pts.) Total mechanical energy  (The sum of kinetic and potential energy)

Answer 1

PE = mgh

so (75kg)(9.8m/s2)(100m) = 73,500 Joules

KE = 1/2 m * v^2

so (1/2)(75kg)(60m/s)^2 = 135,000 Joules

ME = 208,500 Joules