# Gravitational Potential question

Watch
Announcements
Thread starter 4 weeks ago
#1
How do you solve both parts i) and ii) of this question?

1
4 weeks ago
#2
(Original post by at.midnight)
How do you solve both parts i) and ii) of this question?
if you integrate the force due to gravity with respect to r you get the potential energy, gravitational potential is that potential energy per unit mass, let me know if that doesn't help enough
0
4 weeks ago
#3
Um I think for A level the result for gravitational potential is used without proof:

gravitational potential = -GM/r
0
4 weeks ago
#4
(Original post by golgiapparatus31)
Um I think for A level the result for gravitational potential is used without proof:

gravitational potential = -GM/r
haha trust me ive only done AS physics but practicing deriving formulas using calculus makes understanding them so much more easy
0
4 weeks ago
#5
(Original post by MacsenT)
haha trust me ive only done AS physics but practicing deriving formulas using calculus makes understanding them so much more easy
Okay but would you derive it in the exam? I think not because that's not useful use of the time allocated to do the exam...

I agree that deriving formulas makes understanding them a lot easier though, but I won't do that when answering questions xD
0
4 weeks ago
#6
nah you wouldn't do it in an exam, but as soon as you give people variable forces they fall to pieces, better to be confident with it before hand
0
4 weeks ago
#7
(Original post by MacsenT)
nah you wouldn't do it in an exam, but as soon as you give people variable forces they fall to pieces, better to be confident with it before hand
What do you mean? If variable force is given in the exam it will probably be solvable using energy method, or studied in class e.g Hooke's law. It will never involve calculus
0
4 weeks ago
#8
(Original post by golgiapparatus31)
What do you mean? If variable force is given in the exam it will probably be solvable using energy method, or studied in class e.g Hooke's law. It will never involve calculus
nah they wont give it in the exam, if they do it would just be something like comparing initial Ek and Ep with final Ek and Ep and saying oh well drag's done a bit of work then, i just mean more in physics in general i dont think you should just be taught to pass the exam
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### Should there be a new university admissions system that ditches predicted grades?

No, I think predicted grades should still be used to make offers (726)
33.81%
Yes, I like the idea of applying to uni after I received my grades (PQA) (920)
42.85%
Yes, I like the idea of receiving offers only after I receive my grades (PQO) (407)
18.96%
I think there is a better option than the ones suggested (let us know in the thread!) (94)
4.38%