Question

An 80.0 kg hiker walks a distance of 400.0 m along a road that slopes 5.0 degrees upward, and then stops. What is the hiker's final gravitational potential energy relative to her original position?

784 J

3.9 × 10^3 J

2.7 × 10^4 J-I got this answer but I am not sure if I am right

3.1 × 10^5 J

Answer 1

formula for gravity is m(mass)g(gravity)h(height)

Answer 2

that is the formula for gravitational potential energy

Answer 3

so I need to find the height

Answer 4

\[\Delta u=mg(hf-hi)\]

Answer 5

h=400 sin 5

Answer 6

so 2.7*10^4 nm

Answer 7

okay, so i got the answer right, thanks