Lesson 1
What happens when two things hit each other?
There is a collision
What causes a change in the motion and shape of colliding objects?
The motion and shape of colliding objects are changed by the energy transfer and the force between the two objects.
Do all objects change shape or bend when they are pushed in a collision?
All objects do change shape or bend when they are pushed in a collision.
How much do you have to push on any object to get it to deform? (temporary vs permanent)
For there to be a permanent deformation, it has to push past the elastic limit, and for it to be a temporary deformation, it has to withstand the elastic limit.
What is kinetic and potential energy?
Kinetic energy: Kinetic energy is the energy of movement
Potential energy: Potential energy is stored energy.
What happens to energy during a collision?
The energy moves from one object to the other and can turn into heat, sound, or motion.
Do all solid objects bend?
All solid objects bend or change shape when pushed in a collision.
What is the elastic limit of a rice noodle and a coffee stirrer?
Rice noodle = 1.5
Coffee stirrer = 1
What is a type B collision?
A type B collision is when the other object moves first, and the damaged object doesn't move.
What things can affect how much an object’s motion changes in a collision?
How heavy the objects are, how fast they’re moving, and how strong the hit is.
What happens to an object’s motion when it gets hit with a stronger force?
It moves faster or farther because a stronger force gives it more push.
What happens if you stretch something past its elastic limit?
It won’t go back to its original shape—it stays stretched out or breaks.
How can kinetic and potential energy work together?
Energy can switch between kinetic and potential energy.
How does the speed of two objects before they hit affect what happens after they collide?
Faster objects hit harder, so there’s a bigger change in their motion.
What happens to a solid object if the force on it is too strong?
It can crack, dent, or even break.
How does the amount of force you use affect how much an object moves or changes shape?
The harder you push or pull, the more it moves or bends.
Two toy cars bump into each other and pull apart. What kind of collision is that?
Type A.
Why does a lighter object move more than a heavier object when they crash into each other?
Because lighter objects are easier to move—the same force makes them speed up more.
How does the direction of a force affect the way an object moves or changes shape?
The object moves or bends in the same direction as the push or pull.
How can you tell if an object’s shape change is temporary or permanent after a collision?
If it goes back to normal, it’s temporary. If it stays bent or broken, it’s permanent.