Brandon and Tom are climbing a mountain. He starts from an elevation of H1=511m above sea level. In 6.18 hours he climbs to an elevation of H2=2746m above sea level. The length of his path is L1=16000m.
Brandon has a mass M1= 91.1kg and Tom has a mass M2=11.2kg
Vertical velocity up the mountain=0.0985m/s
Horizontal velocity down the mountain=0.141 m/s
A)Calculate the change in gravitational potential energy for Brandon and for Tom as they make their climb in the Rockies.
Delta GPE for Brandon=
Delta GPE for Tom=
B)Calculate the average kinetic energy for Brandon and for Tom as they climb up the mountain and as they descend.
KE for Brandon going up=
KE Tom going up
KE for Brandon coming down =
KE for Tom coming down=
The Attempt at a Solution
It seems to simple for question A is too simple to be true so I'm concerned about wether it is correct.
=(91.1kg)(9.8m/s^2)h and (11.2kg)(9.8m/s^2)h
Question:What height should i use for h? Is this the right equation? What is meant by Change in gravitational energy,do I have to subtract them?
KE for Brandon going up
KE Brandon going down
Whats the units for KE?
Is this correct and if so should I do the same for Tom?