Vocabulary
What do we call it when 2 objects come into contact with each other?
Collision
A "force" is defined as a ...
push or a pull.
Friction is a force that _________ ________.
opposes motion.
Name one factor that can cause damage in a collision.
Speed, Mass, Density, Volume, Type of Material, Shape, ...(Many More)
What is "Kinetic Energy"?
The energy of motion.
This term describes the greatest amount of force reached at any single moment during a collision.
Peak Force
When using force arrows, how do we represent greater force?
Use a wider arrow.
When a moving object experiences friction, it usually ________ _______.
slows down.
Which factor is the MOST influential in causing damage in a collision?
Speed
If you're running at your top speed (~15 mph), and a hungry tiger is chasing you (~35 mph), which one of you has more K.E.?
The tiger. More speed = more K.E.
What is the term we use when an object bends out of its original shape?
Deformation
According to Newton's 3rd Law of Motion, the forces exchanged in a collision will be ____________ in strength (force) and _____________ in direction.
equal; opposite
What type of friction does a baseball experience after it is pitched but before the batter hits it?
The Miz pitches to Shohei Ohtani, who connects. Which type of collision is this?
Type C. (The ball is moving, the bat swings to meet it.)
Cart A and Cart B are moving at the same speed. Cart A has less mass. Which cart has more K.E.?
Cart B.
What do we call it when an object reaches a point where it cannot bend or deform any further?
Elastic Limit
According to Newton's 3rd Law of Motion, when a ball is kicked, a foot exerts force onto the ball. In that collision, onto what does the ball exert force?
The foot kicking it.
heavy crate is sitting on the floor. How can we make it easier to move? What does that do?
Put it on a wheeled cart. It changes the friction to rolling friction, reducing the resistance to motion (friction).
You were in the stands! Shohei Ohtani's hit comes right at you, but you were looking for the hot dog vendor. You got beaned in the head! Which type of collision is this?
Type B (YOU are the main object!)
Cart X gets 3 times its original MASS. Cart Y instead gets 3 times its original SPEED. Which cart ends up with the GREATER kinetic energy?
Cart Y. (Speed has the greater effect.)
What term do we use to to describe an object that is pushed past its elastic limit?
Breaking Point
When a baseball bat hits a baseball, how much force does the ball exert onto the bat?
The exact same amount the bat exerts onto the ball.
Why is static friction beneficial?
It allows objects to stay in place (like our feet, so we can stand and walk). {There are many correct answers.}
After you regain conscienceness, some dude hands you the ball that hit you. You grab it, and give him "5" (slap his open hand). Which type of collision is this?
Type A
Cart D & Cart E collide into each other. Then Cart H collides into a wall. Which collision had more K.E.? Which collision had the greater peak force?
The first collision (between Carts D & E) for both questions. Both carts moving creates more K.E. Peak force is built off of K.E.