Ok so I'm in college upgrading, and doing my physics 20. I have a hand in assignment due Wednesday and I can't for the life of me figure out these two questions.(adsbygoogle = window.adsbygoogle || []).push({});

6.The 4.0kg block shown accelerates across a frictionless horizontal table at 1.5m/s^{2}.

Find the mass of object m1

A. 0.61kg B. 0.72kg C. 6.0kg D. 26kg

For m1 I have: F_{N}=Fg. Fg=mg, so 39N. F_{T}-0(no Ff)=ma . So F_{T}is 6.0N. And then I'm lost.

8. A 45kg toboggan and rider decelerate on level show at 0.53m/s^{2}. What is the coefficient of friction between the toboggan and the snow?

A. 0.012 B. 0.054 C. 0.22 D. 0.53

I got that F_{N}=Fg. Fg=mg so 441.45N(rounded to 2SD). F_{net}=ma so 24N. And then I'm lost. I know that μ=Ff/F_{N}

Someone help me please!

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# Finding mass within a pulley system. Finding coefficient of friction

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