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The force equation

Subject: Chemistry
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To determine the relationship between force and acceleration, ie, Newton's first and second law.


Newton's First Law: An object at rest or in uniform rectilinear motion as long as no external forces are acting.

Newton's second law: F = m. A


We measured the acceleration of a carriage moving along a path with a constant speed.

We measured the mass of the cart and pull the weight with a wave.

The force which gave rise to the acceleration was dragviktens mass times g.

We compared atheoretical with auppmätt


The mass:

mdragvikt = 0.13 kg

Mtotal = 1.1 kg

The Power:

FACC = m. g = 0.13. 9.82 = 1.3 N


T1 = 1.31 s

T2 = 1.29 p = 1.29 p Tsnitt

T3 = 1.26 s

Vmedel = s = 1 = 0.775 m / s
1.29 t
vslut = 0.775. 2 = 1.55 m / s
vstart = 0 m / s


auppmätt = V = 1.55 = 1.2 m / s2
1.29 t

atheoretical = F = 1.3 = 1.18 m / s2
1.1 m


The theoretical and the measured acceleration was very similar. Newton's laws seems to fit well.
Sources of error
It was difficult to measure the time it took for the cart to go one meter. At such short times, the reaction time is crucial.
We leaned path to compensate for friction, but perhaps leaned we track a bit too little or too much.

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