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Post lab 6 -----------------------------------------------------------------------------1. How would our results change if we add the effects of

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Post lab 6 ------------------------------------------------------------------------------ 1. How would our results change if we add the effects of friction at the pivot in this experiment? Explain. 2. If we had used a heavier bar, how would our graphs have changed? Why? (Explain how the slope and intercept would change.) 3. If a 40 kg person and a 70kg person want to seat on a seesaw which has a length of 4 m, how far would they need to be from the pivot in order to rock back and forth easily? (the pivot point is on the middle of the seesaw) Show your work. 4. Three forces of the same magnitude act on a square that can rotate about point P. suppose that each force is 1N and the length of the square is 1m. Find the magnitude and direction of the net torque on the square about the point P. 5. A crane with 20 m arm long falls over if there is a torque of 100,000 Nm on it, how much mass can it lift when the arm is about at 60 degrees from horizontal? Show your work. 6. A triple beam balance, like the ones we use every week in lab, work using rotational equilibrium. If a 253 g mass is placed on the pan, 1 cm from the pivot, and there are three masses, 1 g, 10 g, and 50 g masses on the other side can be slid back and forth between 0 cm and 10 cm from the pivot, where would the masses need to be placed? Full credit only if you provide values at whole-integers of centimeters for the three masses.
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