##### I need help with this Physics question

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An astronaut stands by the rim of a crater on the moon, where the acceleration of gravity is 1.62 m/s2 . To determine the depth of the crater, she drops a rock and measures the time it takes for it to hit the bottom. If the depth of the crater is 120 m, how long does it take for the rock to fall?

Jun 7th, 2015

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Jun 7th, 2015

The answer is wrong it should be twelve

Jun 7th, 2015

please wait let me check it again

Jun 7th, 2015

sorry i made some other thing

see

S = 120 m

g =1.62

t =??

substitutes values we get , 120 = 0+1/2 * 1.62* t^2
or , 120 = 0.81 t^2

or ,  t^2 = 120/0.81 = 148  or   t = 12.17 sec

or Answer time = 12 sec

Sorry ::::: for wrong answer ... please ask if have any doubt ....

Jun 7th, 2015

But I was expecting this question frm you just for 1.5\$ .... !!!!!

A car traveling with velocity v is decelerated by a constant acceleration ------------

Jun 7th, 2015

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Jun 7th, 2015

I send you the question I will pay you can you please answer another question for me besides that one?

Jun 7th, 2015

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Jun 7th, 2015

answer for your question is    ========= 4d

Jun 7th, 2015

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Jun 7th, 2015
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Jun 7th, 2015
Oct 23rd, 2017
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