Newton's Third Law

This week in science, we learnt that if there is an arrow on a force diagram that is facing down, the object is accelerating or decelerating. It is not showing an object going in a direction.

Newton's third law claims that the amount of force exerted by an object gets exerted back on the object that exerted that the force. This is cenerio a i am using as an example: (to the left)

The young girl pushes the old lady and soon they both will go in opposite directions the same distance from the origon that the girl had first applied the pushing force.

Newton second Law explains that force is equal to mass multiplied by acceleration. F=(m/a)

And that concluded our week in science.

Force part two

this week in science, we learned more on the unit force. We discovered that there is gravity,"Force of the Earth puling on us": is weight.
We also discussed the idea of the mass or massiveness. Mass is the amount of matter that is consisted in a substance.

Mass is what gives us weight. It is because the mass of a substance is pulling down on us, that of force that is pulling down on us gives us our weight!

In space, there is no gravity until we come close to a huge mass like the moon or another planet. So, if we launch a rocket into space, the rocket will stay in the course that we put it in. Then the rocket will start accelerating toward a mass because of the mass' gravity is bulling down on the rocket toward the mass. So eventually, with the gaining acceleration of our rocket, the rocket will crash into the mass.

Since the moon has a lesser gravity than the Earth, the moon will have a less pull on the objects near it. Or less gravity in the objects near it.

Force

This week in science, we learnt that there is something that makes things and us move. and that is force. Force is a push or a pull on a object.

So, we learnt how to make force diagrams. a force diagram is a diagram that shows all the different forces exhibited on the object of interest.

If the object of interest is staying in the air, either held up or stagnant in the air, that means there is a positive force and is contradicted by a negative force and so, that means there is 0 newtons being exited on the object of interest which means the object is staying in the air or is being held up.

This is how i know how many newtons are being applied to the object to make it stay in the air:(to the left)

Science this week

Well this week in science we did not do many things. We just went according to the packet that we have all the Kinematics questions in. We did learn something new about velocity arrows. This is the same thing as the dot diagram or the motion diagram except this has arrows to show which direction that the object of measure is traveling in. Mark, Chris and i did a lab on how to measure the distance traveled when we hit a basketball with a hammer. We found we created a graph ob it and we were able to conclude that the basket ball starts off at a fast speed, then slows down constantly over a long period of time. Then on Friday, we had a partner quiz on all the things that we had learnt. We were supposed to make a graph on how fast somethings was going. And, that concluded our week in science

This is important for us to learn so we know how to calculate speeds pf things later in life if we are talking a physics career.

Science in school this week

this week in science, We only did tings about lab report on how we could find the normal speed that our object was moving at.

Our objective was to locate where in six meters would a fast car and a slow car, we took the speed of the fast car by measuring how long it took the car to travel six meters, then we divided the six meters by the seconds the time that it took the car to accomplish the six meters. The equation that we used was: Change in Position

Change in time

So, the fast car's speed came out to be 14.56 seconds over the distance of 6 meters.

The slow car's speed came out to be 27.6 seconds over 6 meters.

The fast car's speed came out to be 0.411 meters/seconds

The slow car's speed was 0.22 meters/seconds

Thats almost half the speed of the the fast car's speed.

So, we predicted that the the crash between the two cars shall take place somewhere in the six meters closer to the slow car.

Before we did this in class, we learnt what a slope was. It is the same thing as the speed. You calculate the slope by taking one point of the position and subtract the second point from the first point. Then divide that by the first point's time and subtract the second points time.

cow eyes!!!

i didn't blog when we did the cow eyes because i had the flu and was out on the Wednesday. The cow eye dissection was very important because that showed us how the eye works and how it lets the light pass through the eye causing us to see This is very important because we should know how our eyes use refraction to let us see and how the principals of light are applied to how we see.

We got to see some of the following parts in the cow's eye:

1. Retina
2. Optic nerve
3. lens
4. Iris
5. pupil
6. Cornea
7. Optic disk

It was pretty cool.

what i learnt was that the light would enter the eye and refract in the Aqueos Humerous and go through the pupil and refract in the lens and goes to the retina and casts the picture of what the light bounced off of and thats how we see.

A three day week in science

This week, we only had three days to learn things in science. On Monday, we took a partner quiz reviewing a lot of things of that happened in science to make sure that we remembered those things.

Trend lines

According to my understanding, A trend line doesn't have to exactly fit the dots that were placed on the graph because it shows how much uncertainty is in the results on the graph.

The black trend line shows that the results could have been according to the path of the line and no the results displayed on the graph.

On Wednesday, we discussed or homework which is about functions or equations to help create an index. this is an example function like we got in our home work.

Bob starts at t1 hours and reaches her destination at t2 hours at a position h1 and reached a position of h2, our function would be... t2-t1*h2-h1.

This is important to us because functions help us calculate complex things that we will need for jobs like rocket science and professions in math.