P2.2 Flashcards
What happens when an object speeds up or slows down
The kinetic energy increases or decreases
What is the momentum of an object
The product of the object’s mass and velocity
When a force causes an object to move through a distance…….
Work is done
What is transferred when work is done
Energy
What is power
Work done or energy transferred in a given time
What is gravitational potential energy
Energy that an object has by virtue of its position in a gravitational field
What happens when an object is raised vertically
Work is done against gravitational force and the object gains gravitational potential energy
What does the kinetic energy of an object depend on
Mass and speed
What is the conservation of momentum
In a closed system the total momentum before an event is equal to the total momentum after
Equation for work done
Force x distance
What has kinetic energy
Anything that is moving
What does a moving car have
Lots of kinetic energy
What needs to happen to slow down a car
Kinetic energy needs to be transferred into different forms of energy
What happens when something falls oo
Its gravitational potential energy is converted into kinetic energy so the further it goes, the faster it falls
