Newton’s second law

Experiment 2, Newton’s second law.

Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).

What does this mean? Everyone knows that heavier objects require more force to move the same distance as lighter objects.

Material we use.

• Fiction car.

• Object of half kilogram.

• Tape measure.

• Timer.

Data

• Car’s weight: 175g

• Rock: 500g.

Procedure

• In the car only.

If a 175g car moves in a 2 meter surface in a period of 2.19 seconds, what will be the acceleration of the object?

If a=Vf-Vo/t, we substitute to a=2-0/2.19

0.913m/s2

• In the car with the rock.

If a 675g car moves in a 1.37 meter surface in a period of 3.68 seconds, what will be the acceleration of the object?

If a=Vf-Vo/t, we substitute to a=1.37-0/3.68

0.372m/s2

Questions

• Why the car loses speed?

Because the weight of the car isn’t proportional at the force that is using, so it makes it slower.

• What will happen if we add another half kilogram to the car?

It probably won’t move

• What will be the acceleration if we have the car with an object of 210g and advance in 2.87sec?

• 0.709m/s2

What were the difficulties?

We just had a little situation, because the car that we had didn’t work very well, so my friend Chente fixed the car and we did the practice, and result fine.

What did we observe?

We saw that the car easily could move without any other weight, meanwhile that with the addition of half kilogram the car didn’t move pretty well, inclusive didn’t reach the 2 meters.

What made the experiment work?

The impulsion of the friction of the car, it gives the force to move the car by itself.

Importance

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