Lesson 2
What do we draw to show force?
We draw vector arrows and a dot. <-----.----->
What causes something to get crushed?
Unbalanced forces.
What happens to an object when less force is added and more force is added?
Less force - goes slow
More force - goes faster
If barrels are knocked down are the forces acting on it balanced or unbalanced?
Unbalanced.
Force-
A push or a pull.
what do balanced forces look like as vectors on an object?
The force vectors will be equal in sizes.<----.---->
What happens when you push on an object?
we feel the object resisting which feels like the object is pushing back.
How does changing the amount of force applied to an object affect the distance it will move?
Less force - less distance
More force - more distance
If someone through a ball, what ball should they pick? 0.5 kg 1 kg 3 kg?
3 kg.
Mass-
The amount of matter in an object.
What do unbalanced forces look like as vectors on an object?
One of the force vectors will be bigger than the other. <--.---------->
What is the meaning when we say something is stable?
The forces acting on something are balanced - add up to 0 - equal.
How are mass, force, and distance related?
More mass and less force=less distance
less mass and more force=more distance
If a plane continues to fly at a constant speed, what would the forces look like?
<----.---->
Gravity-
A "downward" force exerted on everything that has mass by the earth.
How do force vectors show direction and magnitude?
Magnitude shows how big the arrow is and Direction is what way an arrow is pointing.
Do balanced forces make something move? Explain.
No because the forces are equal so no movement.
How many variables do you need to make an fair science investigation?
You need 3 variables.
What is criteria?
Things that would be nice to happen.
Acceleration-
The change in motion due to the objects changing speed.
Describe the force pairs between 2 interacting objects.
If the forces are not moving they are equal, if one force is bigger, something will be moving
Do unbalanced forces make something move? Explain.
Yes because one force is bigger than another. It is unbalanced and there will be movement.
What are the names of the variables that you need to make an fair science investigation?
Dependent, independent, and controlled/constant.
What are constraints?
Things that must happen.
Collision-
An event in which two (or more) bodies (objects) exert forces on each other for a period of time two (or more) object interact through contact.