E201: Title of the Experiment
Justine Rosabella C. Jimenez
(School of Civil, Environmental, and Geological Engineering, Mapúa University, Philippines)
Results and Discussion
Work is the product of force and displacement and if the force and displacement have the same direction, angle ?
would be 0. Determining the Force, Work and Power of the fan cart is the main objective in the first part of the
experiment, our group used the equation (1), (2) and (3) to calculate the required values. The force of the fan cart
remained constant all throughout the four trials of the first part of the experiment.
Force of the cart = weight of pan + weight added (1)
W = Force ? Displacement (2)
(3)
W = mass? length (1-cos?) (4)
GPE = mgh (5)
During the Part 1 of the experiment, our group used a high-tech phone to run the compass app for us to know if the fan
cart was exactly on the 0o angle or if it is in a horizontal dynamics track. Table 1 shows as the values of work and
power increases but as you can see on table 1, we got a lower values for a reason that the other one wheel of the fan
cart we used doesn’t run smoothly when we try to roll its wheels before starting our experiment. In the Part 2 of the
experiment, every group were asked to determine the Work by a Force on a Curved Path. In our experiment, it shows
that the higher its height, the greater potential energy it restores. Equation (4), (5) and (6) was used in the second part
of the experiment. Through Table 2, the data obtained from the experiment was shown including the Graph 1.

TABLE 1. Part 1. Determining the Force, Work, ; Power of the Fan Cart.
Force of Fan Cart = weight of pan +weight added = 0.245 Newtons
Trial Displacement, Time, Work Power
1 0.30 m 0.34526 s 0.1029 J 0.298036 W
2 0.40 m 0.4859 s 0. 1372 J 0.21177 W
3 0.50 m 0.641 s 0. 1715 J 0.16053 W
4 0.60 m 0.815 s 0.2058 J 0.126258 W
TABLE 2. Part 2. Work by a Force on a Curved Path.
Length of string, =
0.235m

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Weight of mass, = 4.9 N

Initial height =0.22m
Trial Force Final height,
hf
Increase
in
height,

Angle, Displacement,

Work GPE
1 2 N 0.235 m 0.015 m 20 0.092 m 0.069 J 0.0735 J
2 4 N 0. 263 m 0.043 m 40 0.14 m 0.269 J 0.2107 J
3 6 N 0.295 m 0.075 m 50 0.18 m 0.411 J 0.3675 J
4 8 N 0.335 m 0.115 m 60 0.21 m 0.575 J 0.5635 J
Power = ;#55349;;#56394;;#55349;;#56412;;#55349;;#56415;;#55349;;#56408;
;#55349;;#56417;;#55349;;#56406;;#55349;;#56410;;#55349;;#56402; S t L w oh h X

Graph 1

As the amount of work increases, the GPE also increases which states their direct relationship
Figure 1. This figure shows the 00 angle in Figure 2. This shows the running of the fan
dynamics track using the compass app. cart passing through the photogates.
Figure 3. It shows that they measure initial Figure 4. This shows me, rewriting our
height of the mass and length of the string data and computations in our notebook.
Conclusions
The primary objectives of this experiment were met. The principles that have been discussed in the lecture was
applied. Our group were able to determine the power of the fan cart by using the definition of work and energy conservation
principle and we also did compute for the motion along a curved path. Based on the results we gathered, it states that work
and power are inversely related and the increase in the displacement is also an increase in the time of the fan cart. Before
letting the fan cart run, it’s important to hold it first for us to be able to get an accurate result but as what I’ve said in the
discussion part, we have a problem with the one wheel but despite of that, we still get an accurate result but a lower one.
For the part 2, I therefore conclude that as the object gets farther from the earth’s surface, more force is applied in order to
move and the work needed to do this against gravitational force is then stored or converted as potential energy. And in a
curved path, the total work done to raise an object is equal to the GPE restored.
References
http://www.scienceclarified.com/everyday/Real-Life-Physics-Vol-2/Energy-Real-life-applications.html
http://www.physicsclassroom.com/mmedia/energy/au.cfm
y = 1.1057x -0.2206
R² = 0.9717
0
0.5
1
00.20.40.60.81
WORK VS. GRAVITATIONAL
POTENTIAL ENERGY