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Mathematics 20 Online
zarkam21:

Is this correct

zarkam21:

1 attachment
zarkam21:

@Hero

zarkam21:

@Nnesha

zarkam21:

@Arcadiouse

zarkam21:

@pooja195

Arcadiouse:

couldn't answer that lol

zarkam21:

Lol its okay I miss @Vocaloid today,

Arcadiouse:

I bet lol

pooja195:

Any ideas as to where you should start?

pooja195:

Do you know how gravitational energy is calculated? (also just an fyi, the answer you have is incorrect)

zarkam21:

Yes I do ,,, it is gpe=mgh

pooja195:

Can you do those calculations?

zarkam21:

where m is mass g is gravitational acceleration and h is height

zarkam21:

yeah but there are two measures of height provided , which do I use?

pooja195:

Gravitational Potential Energy = (Height from ground) * (acceleration of gravity) * (mass of object). You would use the initial height

zarkam21:

I got 44.1

pooja195:

Ok so that solves part of our problem,however, it said ADDED so potential after minus the potential So we need to find potential after

pooja195:

How would you do that?

zarkam21:

But then what about the other height provided 0.3+1.0

zarkam21:

0.3+1.0***

pooja195:

Why would you do that?

zarkam21:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @pooja195 Ok so that solves part of our problem,however, it said ADDED so potential after minus the potential So we need to find potential after \(\color{#0cbb34}{\text{End of Quote}}\)

zarkam21:

wait it would be 1.0-0.3

pooja195:

Potential before is BEFORE it was lifted. So we would multiply 0.3 * 15 *9.8=44.1 Now the same with the other height: 0.1 * 15 * 9.8=?

zarkam21:

14.7

zarkam21:

44.1-14.7=29.4

pooja195:

I think you mean 15 x 9.8 x 1 = 147

zarkam21:

yes

pooja195:

147-44.1=?

zarkam21:

102.9

pooja195:

Yep

zarkam21:

Oh my thank you soooo much sugarplum

pooja195:

So our steps: 15 * 9.8 * .3 = 44.1 15 * 9.8 * 1 = 147 147 - 44.1 = 102.9J 102.9 J You're welcome cashew ;)

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