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paulb203

Member

Registered: 2023-02-24

Posts: 345

Direct and Inverse Proportion

The force, F newtons, exerted by a magnet on a metal object is inversely proportional to the square of the distance d cm

When d=2cm, F=50N

Express F in terms of d

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I got as far as F = 200/(d^2)

But then wasn't sure if that was enough. Do I have to somehow isolate d, so that F is expressed in terms of d, not in terms of d^2?

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KerimF

Member

From: Aleppo-Syria

Registered: 2018-08-10

Posts: 256

Re: Direct and Inverse Proportion

As I hear it, "Express F in terms of d" is equivalent to "Express F as a function of d". And this is what you did.

Last edited by KerimF (2024-02-07 19:49:44)

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Bob

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Registered: 2010-06-20

Posts: 10,640

Re: Direct and Inverse Proportion

If it said express d in terms of F then you'd need d = .... and would have to have a square root. But it doesn't.

Bob

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paulb203

Member

Registered: 2023-02-24

Posts: 345

Re: Direct and Inverse Proportion

Thanks, guys.

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Prioritise. Persevere. No pain, no gain.