# Science Class Lesson 2 Chapter 11

## Newtons 2nd and 3rd Law's

2nd Law:If there is more mass in a object the acceleration will decrease if the object has less mass the acceleration will increase. 3rd Law:For every action there is a equal and oppisite reaction.
In this picture it has more mass so less acceleration.
In this picture ther pushing against each other for that is a action and reaction forces.

## Weightlessness

My personal meaning is when there isnt enough gravity you will fell like you have no weight what so ever.For example if i was in space i would feel like I dont have any weight.
In this picture hes in space so he feels weightlessness.

## Mass

Mass is how much matter is in a object for example a baseball has more mass than a tennis ball.If i hit the baseball and tennis ball at the same speed the baseball will go less further because it has more mass.

## Momentum

My personal meaning is if the object has more mass it will keep speeding up and it gets faster and faster for example if you hit a baseball it will have more momentum than hitting a tennis ball because the tennis ball has less mass.
In this picture there are running and building up momentum as they run harder.

## Gravity

My personal meaning is gravity pulls you down so we dont float into space for example I stay on the ground and dont float into space because of gravity.
In this picture gravity causes this apple to fall on his head.