1st Law
What is the 1st law?
Anything that is in motion stays in motion and an object that is at rest stays at rest AKA Inertia.
What is mass?
The amount of matter in an object.
What is the 3rd law?
If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
The equation of force is...
F=mass(m) x acceleration(a)
There is a tablecloth under a pile of wooden planks, if the cloth gets ripped out fast from under the planks what happens?
The planks stay in the same spot they were previously in.
Who claimed that objects need a force to keep moving at a constant velocity?
Aristotle
What is the definition of Net Force?
The net force is just the sum of all of these forces acting on an object.
What happens if everyone jumps at the same time?
Nothing
What is the equation for acceleration?
Acceleration = Velocity x Time
A boy is very angry, so he punches a wall. There is an equal force from his hand to the wall and the wall to his hand. Although it hurts the boy more. Why?
Since the wall has a lot more mass than the little boy, the boy had all of the acceleration making his hand feel the reaction more even though the reaction produced equal force.
Who imagined a world with no friction?
Galileo
For a constant force, an increase in the mass will result in a decrease in the __________.
Aceleration
When two different objects with different masses react with each other, which one experiences the greater force?
Neither, both objects experience the same force.
What is the equation for volume?
Length x Width x Height
A car is driving down the highway at a fast pace. All of a sudden a tree appeared in the middle of the road and the car slammed into it. What happened to the person in the car?
The person in the car will go flying forward, and if they are without a seatbelt, they may go through the windshield.
An object stays at a _________ __________ unless acted on by a net force.
constant velocity
What is the second law of motion?
An object with less mass will have a greater acceleration than an object with greater mass even though they were acted upon with the same force.
The word force used in physics describes a _________.
Interaction between two objects
What is the force equation for two objects that differ in mass?
Ma=mA
Big mass little acceleration = Little mass big acceleration
Two shopping carts are let down a hill at the same time. One is empty and one has five watermelons in it. Which cart will make it to the bottom of the hill first?
The heavier one.
What is inertia?
The tendency of an object to resist any change in motion.
If the mass is doubled, then acceleration will be ______.
Halved
A single object does not have it's own _________.
Force
Acceleration in a given direction = _________
Net force
There is morning dew sitting on the surface of a leaf, when a kid hits the leaf with a thin stick, what happens to the little water droplets that were once on the leaf?
They will stay where the leaf once was and then gravity will pull them to the ground.