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!

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding mass within a pulley system. Finding coefficient of friction

**Physics Forums | Science Articles, Homework Help, Discussion**