Forces
A push or pull.
Force
The kind where gravity is more involved.
Vertical collisions
The energy of motion.
Kinetic energy
Another name for nerve cells.
Neurons
Force between two objects touching.
Friction
If there is too much friction between two surfaces, ________ can build up.
Heat
There's really only two types of collisions. Name both.
1. One object is moving and the other is not moving
2. Both objects are moving
The units for kinetic energy.
Joules or J
Name two materials that are good at protecting objects during collisions.
Foam, rubber, air, bubble wrap, water, plastic, etc.
Force that acts on all objects all the time, no matter what those objects are doing.
Gravity
The force that keeps my NASA symbol on my filing cabinet.
Name any collision that doesn't involve a car.
Lots of answers
When you double the mass of an object, you __________ its kinetic energy.
Double
With the index card lab, what was the dependent variable?
The energy of motion.
Kinetic energy
Name three parts a car's air bag protects the driver from in an accident.
The steering wheel, the dashboard and the windshield
Why would pieces flying away from a car in a collision be a good thing?
Because those pieces are carrying energy away from the car, so less energy can be absorbed by the people inside
When you double the velocity of an object, you _______________ its kinetic energy.
Quadruple
If I needed get a table down to the gym from my room, why would it be easier to move it using wheels instead of dragging it there?
The wheels reduce friction, so it requires less force
Speed plus a direction.
Velocity
Why would you want a phone case made of rubber or soft plastic instead of metal? Think about what we've worked on in this unit.
Because the rubber or soft plastic will deform, or change shape, more easily, carrying more energy away from the phone if it's involved in a collision.
You draw on a piece of paper with a colored pencil. Describe that collision and why the colored pencil needs to be sharpened occasionally.
The colored pencil gets dragged across the paper, creating friction and transferring some of the colored tip of the pencil to the paper. If enough of the tip gets removed from the pencil, some of the wood around the tip needs to be shaved off in a sharpener so more color becomes available.
How can an object have no kinetic energy?
It's not moving
Why is the fact that we have so many pain sensors in our skin a good thing?
Because pain tells us when to stop or start doing something, keeping us safe and healthy
Vehicles that cut through the air easily are said to be very _________________.
Aerodynamic