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# Physics Unit 4 - NEED HELP!!!

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1. Could someone explain to me the why the answers is D in the following question?
http://prntscr.com/as9d0q

Also I'm not sure how to do this one:
http://prntscr.com/as9der
2. Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.

You can also find the Exam Thread list for A-levels here and GCSE here.

Just quoting in Puddles the Monkey so she can move the thread if needed
Spoiler:
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(Original post by Puddles the Monkey)
x
Could someone explain to me the why the answers is D in the following question?
http://prntscr.com/as9d0q
Can you see that C and D contradict each other? If the statement of C is true, then D is false or vice versus.

Also I'm not sure how to do this one:
http://prntscr.com/as9der
Based on the formula of electric field strength for uniform electric field which is

where is the electric potential difference.

Using this analogy, we can deduce a similar formula for gravitational field strength.

With these formulas, you should be able to show that the answer is
Spoiler:
Show
A

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