An apple in a tree has a gravitational potential energy of 175 J and a weight of 3.5 N. How high from the ground is the apple?

Question

firejay5 · Answer

Who is right?

Teacher's Answers:

4. 50 m

My Answers
4. h = PE/mg
       = 175/(3.5)(9.8)
       = 5.1m

anonymous · Answer

You mistakenly used the weight of the apple (3.5 N) as the mass. This error is a very common one. The mg in your solution is 3.5 N.

firejay5 · Answer

I need clarification on how to show my work for this problem

anonymous · Answer

Well, we know that $$F_g = mg = 3.5 \text{ N}$$Therefore, $$\Delta h = \frac{ E_g }{ mg }=\frac{ E_g }{ F_g }$$$$=\frac{ 175 }{ 3.5 }$$$$=5.0 \times 10^1 \text{ m}$$

firejay5 · Answer

okay nevermind @ospreytriple thanks for your help on all of my Physics work it means a lot to me

anonymous · Answer

You're welcome

firejay5 · Answer

no one rarely helps me on here with the best explanation