Indicate valleys, hills, steepness and gentleness of slopes.
Let's assume that ground level is the height 0 meters. The change in potential energy is going to be gravitational potential energy, which is given by PE=mgh.
ΔPE=mgh-mgy
=mg(h-y)
=50(28-0)
=1400 J
- neon signs
- fireworks
- rockets during the ascent
- meteors
- fireflies
- stars
