Lab Report PhyI-02: Mechanical Equilibrium
Student’s name___David Salama_____ CRN _41928___ Date _Oct 25 ___
First angle is 15°, mass suspended over first pulley = mass of hanger 5.1 g + extra mass
of 15.0 g
Second angle is 110°, mass suspended over second pulley = mass of hanger 5.1 g + extra
mass of 10.0 g
From the Data file:
Third angle is _233__°, mass suspended over third pulley = mass of hanger 5.1 g + extra
mass of _9.15___ g
Table 1
FA FB Equilibrant, FE
Method Direction Directio
Magnitu Magnitud Magnitude, Direction,
, θA , n, θB, mN θE, degrees
de, mN e, mN
degrees degrees
Experiment 196.98 15° 147.98 110° 139.65 mN 233°
: mN mN
Ax = Bx = - Ex = -84.04
190.27 50.61 mN
Component Ey = -111.53
mN mN
: N/A N/A mN
Ay = By = 233°
50.98 139.06m FE = 139.65 m
mN N N
Graphical:
Conclusion:
, - The purpose of this lab was to use the force table to determine
experimentally and graphically the force that will balance the other two
forces. The main force of error would be the error resulting from using the
force table as it might not be perfectly accurate with balancing the forces.
Other errors that might have affected the experiment are ignoring the force
of friction between the string and pulley, ignoring the mass of the string, and
ignoring the fact that the string might stretch and so we will have to consider
the Tension force in the calculations. I think the most precise method would
be the experimental method as most of the errors we listed above are
considered. We have reached the lab purpose which was calculating the
equilibrium in different ways based on the data we have collected. Finally,
the results were similar to each other even though they were calculated with
different methods.
Calculations are below!
Student’s name___David Salama_____ CRN _41928___ Date _Oct 25 ___
First angle is 15°, mass suspended over first pulley = mass of hanger 5.1 g + extra mass
of 15.0 g
Second angle is 110°, mass suspended over second pulley = mass of hanger 5.1 g + extra
mass of 10.0 g
From the Data file:
Third angle is _233__°, mass suspended over third pulley = mass of hanger 5.1 g + extra
mass of _9.15___ g
Table 1
FA FB Equilibrant, FE
Method Direction Directio
Magnitu Magnitud Magnitude, Direction,
, θA , n, θB, mN θE, degrees
de, mN e, mN
degrees degrees
Experiment 196.98 15° 147.98 110° 139.65 mN 233°
: mN mN
Ax = Bx = - Ex = -84.04
190.27 50.61 mN
Component Ey = -111.53
mN mN
: N/A N/A mN
Ay = By = 233°
50.98 139.06m FE = 139.65 m
mN N N
Graphical:
Conclusion:
, - The purpose of this lab was to use the force table to determine
experimentally and graphically the force that will balance the other two
forces. The main force of error would be the error resulting from using the
force table as it might not be perfectly accurate with balancing the forces.
Other errors that might have affected the experiment are ignoring the force
of friction between the string and pulley, ignoring the mass of the string, and
ignoring the fact that the string might stretch and so we will have to consider
the Tension force in the calculations. I think the most precise method would
be the experimental method as most of the errors we listed above are
considered. We have reached the lab purpose which was calculating the
equilibrium in different ways based on the data we have collected. Finally,
the results were similar to each other even though they were calculated with
different methods.
Calculations are below!
