Key Concepts
the pulling or pushing of an object
force
What material was the best at protection in the collision test?
Cotton ball
Give an example of Newton's First Law
* Brakes applied by a bus driver abruptly
* A marathoner running past the finish line
* Ball rolling on the ground
How much force is required to accelerate an 6 kg wagon by 9 m/s^2?
54 newtons
What type of collision would a moving car hitting a motionless tree be?
Collision A
a force acting in the opposite direction of an object’s motion.
friction
What material performed the worst in the collision test?
Metal
Give an example of a characteristic of a protective material.
* soft
* deforms/bends
* air pockets
What is it called when an object bends or changes shape?
Deform
What type of collision would a motionless wall being collided with a moving baseball be?
Collision B
the amount of energy an object has before moving
Potential Energy
What did we test when we used the force tool to break the wooden stir sticks? An object's __________
Breaking Point
Give an example of Newton's Third Law
* pushing against a wall; wall pushing back
* walking on ground; ground pushing back
* stepping off a boat
What two things affect kinetic energy?
Mass and Speed
What type of collision would a motionless desk being run into by a student be?
Collision B
the energy of objects when they are moving
Kinetic Energy
The more rings that were added to the carts (in the videos) the amount of force was increased or reduced?
Reduced
Give an one example of a force acting on a moving car.
* Gravity
* Friction
* Air Resistance
All objects deform when they collide with one another.
True or False
True
What type of collision would 2 cars colliding together be?
Collision C
“for every action, there is an equal, but opposite, reaction.”
Newton's Third Law
What did we discover in the change of mass and change of speed of a cart lab? ________ is more important in order to affect kinetic energy?
Speed
Give me an example of an object having kinetic energy and an object having potential energy.
Teacher Decides right or wrong
An object will break when it deforms past its ________________.
What collision type would be a baseball colliding with a net be?
Collision A