I have a couple homework problems that are causing me some trouble...(adsbygoogle = window.adsbygoogle || []).push({});

1. The weight of 600g of salami is:

a) 0.061 N

b) 5.9 N

c) 61 N

d) 5.9 kN

I found the answer to be a) 0.061N because F=mg so m=F/g which is

0.6kg/9.8m/sec.squared. The answer is actually b) 5.9 N but I can not figure out how the got this answer. Any insights to this?

Also...

2. A 60-kg person stands on a scale in an elevator. How many newtons does the scale read when a) it is ascending at the constant speed of 3.0 m/sec.squared? b) it is desending at the constant speed of 3.0 m/sec. squared?

I am not sure how to find this out. On one hand, I think that I need to find the acceleration at these speeds. Yet I do not think that there is any acceleration when the speed is constant. Am I sorta on the right track here?

Thanks for your help!

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# Homework Help: Questions dealing with the Second Law of Motion

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