Rotational Equilibrium

# Rotational Equilibrium - Rotational Equilibrium Karmen Best...

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Rotational Equilibrium Karmen Best, [email protected] Al Ryan PY211L Section 208 Leslie Watkins Lab Performed: 03/25/08 Lab Turned In: 04/01/08

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Introduction The objective of this week’s lab was to confirm that Newton’s second law holds true for rotational equilibrium. Newton’s second law talks about torque in the expression Σ τ = 0 Torque is defined as the movement of a force or system of forces tending to cause rotation, and it is also be expressed as . τ = F x d To study torque we used a meter stick balanced on a fulcrum. By adding 3 known masses, two of which were at known points we were able to determine the position the third needed to be at to balance the meter stick using the equation . τ = m1x1 – m2x2 Here, F1d1 is subtracted because it is going in a clockwise motion. The sign convention with torque is positive for counterclockwise and negative for counterclockwise. Next the same type of experiment was used to experimentally determine the mass of the meter stick.
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