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Crovati
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I have to confirm Newtons 2nd law via a track and trolley experiment
The trolley’s mass is kept constant.
The weight of the cart (252g) plus two bar weights (500g) is = 752 grams, plus additional weights of either, 10g, 15g, 20g, 25g or 30g for the different trials.
The acceleration weights are:
25g
20g
15g
10g
5g
for the different trials.
We used a motion sensor and a software program to get ΔV/Δt.
This is what i got in the end...
Acceleration mass (g)--------Force (N)-----------Average acceleration ms-2
---------5-----------------------0.049---------------------0.10
---------10----------------------0.098---------------------0.22
---------15----------------------0.147---------------------0.36
---------20----------------------0.196---------------------0.44
---------25----------------------0.245---------------------0.63
[/B]
F=ma
a=(1/m)F
[/B]
I plotted an acceleration vs Force graph, which gave me slope=2.6. And I thought that since F=ma, then the slope would be 1/m, and m= 1/2.6 =0.3846... kg.
If i’m thinking correctly then this should be the value for the mass of the trolley (the cart+the bar weights+the additional weights+acceleration mass)
But when i add all of the components of the trolley’s mass I get 787g...which is nowhere near 0.3846... kg.
I’m not sure what i’m doing wrong, or if I’m going about solving this in completely the wrong way. Or maybe I made an error during the experiment?
I’m completely stuck now and don’t know how I can finish my report. I’de really love some help!
Homework Statement
The trolley’s mass is kept constant.
The weight of the cart (252g) plus two bar weights (500g) is = 752 grams, plus additional weights of either, 10g, 15g, 20g, 25g or 30g for the different trials.
The acceleration weights are:
25g
20g
15g
10g
5g
for the different trials.
We used a motion sensor and a software program to get ΔV/Δt.
This is what i got in the end...
Acceleration mass (g)--------Force (N)-----------Average acceleration ms-2
---------5-----------------------0.049---------------------0.10
---------10----------------------0.098---------------------0.22
---------15----------------------0.147---------------------0.36
---------20----------------------0.196---------------------0.44
---------25----------------------0.245---------------------0.63
Homework Equations
[/B]
F=ma
a=(1/m)F
The Attempt at a Solution
[/B]
I plotted an acceleration vs Force graph, which gave me slope=2.6. And I thought that since F=ma, then the slope would be 1/m, and m= 1/2.6 =0.3846... kg.
If i’m thinking correctly then this should be the value for the mass of the trolley (the cart+the bar weights+the additional weights+acceleration mass)
But when i add all of the components of the trolley’s mass I get 787g...which is nowhere near 0.3846... kg.
I’m not sure what i’m doing wrong, or if I’m going about solving this in completely the wrong way. Or maybe I made an error during the experiment?
I’m completely stuck now and don’t know how I can finish my report. I’de really love some help!