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cmNickoli7
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Homework Statement
On Planet X, a 70 kg object can be lifted by a force of 400 N.
a. What is the acceleration of gravity on Planet X?
c. Suppose your car was taken to Planet X. If the car has a mass of 1500 kg, what would its weight be?
Homework Equations
some Formulas I used in solving this:
W = m*g
The Attempt at a Solution
A: W = m*g
400 = 70*g
400/70 = g
g ≈ 5.7 m/s^2
*I checked this and I know that it was correct. So, I used this in the second part of the question as my "g" *
C: W = m*g
W = 1500*5.7
W = 8550 N
*On the website, I put this in the form field and it said it was wrong, So, I got more specific.*
W = 1500*(400/70)
W ≈ 8571.4258571
W ≈ 8571.4 N
*still told me I was wrong. So i tried variations of Significant Digits (8571.43, 8571.426, 8571) all of which, the website said i was wrong. I really would like it if someone could check to make sure that I calculated it right, or if I did something wrong.*
I am teaching myself physics from this website and I am doing well. Although, it is telling me I am wrong, I am not so sure. Of course it could be an error in my calculations but I would like the help of a second pair of eyes. Thanks for taking the time to read this.
The Website Link is : http://library.thinkquest.org/10796/ch4/ch4q.htm