Proving Newtons laws of motion

By: Alix Fernando

Beth Reecer
Briana Duran

Caitlin Jay

First Law

For the first law we used the weight and the spring balance to demonstrate that the weight was at rest because no outside force affected it.

For the car experiment we are showing the car going at constant velocity until it runs into the backpack, which changed the velocity because of the friction and the force of the backpack.

For the marbles we showed them at rest because no force was being acted upon it so this shows Newtons first law that these two marbles will not move because the force is zero.

For the pendulum we showed it at rest with no force and in motion when we pulled back one silver ball that exerted force and caused the pendulum to move.

Second Law

For the second law we shown the weight at rest on the scale. On the scale it reads that the weight is 295 grams and we need to convert 295 grams to kilograms so now the new number is .295 kg. In order to figure out the force of how much the earth is pulling on the weight we use the equation F=ma. we calculated .295kg times 10 m/s^2 and this equals 2.95 Newtons and this is the force of earth pulling on the weight. The picture is above in the first law.

Next, shown below we have a video showing force being pulled on the spring balance because the car was accelerating.

For the marbles at rest on the table we used the equation F=ma to see how much the earth is pulling on the marbles. We used the scale to measure the weight of a marble in grams which is 6 grams. Next we converted the 6 grams into kilograms which is .006 kg. Therefore the force of the earth pulling on each marble is .006 kg times 10 m/s^2 equals 0.06 Newtons.

For the Pendulum we have a video showing a huge force by dropping the silver ball from a higher incline, which caused a faster acceleration. Next we used the same silver ball but dropped it from a lower incline which shows that it did not accelerate as great as the first one from a higher incline.

Third Law

For the cars experiment we used two blue cars and one black string that connected the rear ends of both cars. We turned on the cars and let them go in opposite directions. Because the force is the same for both cars we know that the acceleration and mass is also the same because they are identical cars. However, if one car had a lower or higher mass than the other they would still have the same force but different masses and accelerations. Therefore this proves Newtons third law that for every action there is an equal but opposite reaction.

For the marbles Alix and Beth had the same white clear marbles and flicked them towards each other. When the first marble hit it exerted a force on the second marble which caused the second marble to exert the same equal but opposite force on the first marble, which caused the marbles to split into different directions.

For the last pendulum experiment we lifted 4 silver balls and let them go to hit the fifth silver ball. This caused the three middle silver balls to switch back and forth between the first and fifth silver balls.This video demonstrates how for every action there is an equal but opposite reaction which causes the balls to keep switching back and forth.