The following link shows the problems I have. I have solved them (hopefully); I just need some confirmation or someone to tell me where I went wrong. I'd appreciate it.(adsbygoogle = window.adsbygoogle || []).push({});

http://img399.imageshack.us/img399/1143/examp17vm.jpg [Broken]

1. I am going to say the answer is choice #2, mgsinθ up incline. This one seemed pretty obvious so I'm not going to write out my work unless someone thinks I am incorrect.

2. It didn't say that the banana is restingonanything, so I am going to say F_{3}only is the reaction force to F_{1}(answer choice #2).

3. At the highest point, the upward force is equal in magnitude to the downward force (0,-mg), so they cancel out meaning the weight is not involved. However, at the highest point, the baseball only experiences an xvelocity, which is not a force (since there isn't accel.). Because of this, I am going to say answer choice #4 (no forces on the ball). However, it is difficult the way the question is worded. I could also say that there is a downward force, it is just matched (cancelled out) by the upward force. ??

4. Since the wedge is frictionless, the mass doesn't effect acceleration. m_{1}obviously experiences more accel. due to gravity because the angle is greater, so I am going to say choice #1 (m_{1}reaches the bottom first).

5. I figured the net force to be 20 N to the right. Now I divided by the total mass 3kg+2kg and came up with an acceleration of 4m/s^{2}. I figured the force that m exerts of M is m*4=2*4=8N. Is this right or should I have multiplied the acceleration by the massMinstead?

I would really appreciate it if someone would comment on these. Thank you very much for your time and help

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# Homework Help: A Few Questions (Can Someone Check My Work?)

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