Kinetic Energy
What is Kinetic Energy?
The energy of motion
What is a collision?
When two or more objects hit into one another
What is a force
any push or pull
What is Velocity
the speed and directions of an object
What force will slow down, and eventually stop a moving car?
Friction
If a bike is traveling on a flat sidewalk, what kind of energy does it have?
Kinetic Energy
What is an elastic collision?
A collision that has no loss of energy in the system
What are balanced forces?
When the forces on an object are all equal so there is no change in motion
What is acceleration?
A change in velocity over time (speeding up or slowing now, or change in direction)
If a student wants to find out how much energy is transferred from a moving ball to a stationary ball, what should they measure?
They should measure how far the stationary ball moves when it is hit
The amount of kinetic energy an object has is related to its: (2 answers)
Mass and Speed (or velocity)
What is an inelastic collision?
A collision where some of the kinetic energy from colliding objects will transform into different energy
What are unbalanced forces?
When the forces acting on an object are unequal, so there is a change in motion
The name of a non-contact force that acts on all objects, at all times, pulling objects down
Gravity
What happens when an unbalanced force acts on an object?
It will begin to move, or stop moving.
It will have a change in motion
Give an example of kinetic energy being transferred between objects
ex: a car crash where a moving car transfers its energy into another car, making it move.
ex: Newton’s Cradle
If there is more friction between two objects, it will create (more or less) heat energy
more
Two people are pulling on a rope, and there is no change in motion. What kind of force is this?
Balanced Forces
The law that states energy cannot be created or destroyed, only transformed
Conservation of Energy
Name at least 2 things that can be observed when a baseball is thrown, then hit by a baseball bat?
(types of energy, energy transfers, types of forces, etc)
kinetic energy, collision, unbalanced forces, energy transfer from the bat to the ball, change in motion of the ball