P2.2 - The Kinetic energy of objects speeding up or slowing down Flashcards
When a force causes an object to move through distance…
…work is done
What is the equation related to work done, force and distance?
W = f x d
What happens to energy when work is done?
It is transferred
Work is done against…
…frictional forces
What is power?
The work done or energy transferred in a given time
When an object is raised vertically, work is done against…
…gravitational force and the object gains gravitational potential energy
What is gravitational potential energy?
The energy that an object has by virtue of its position in a gravitational field.
What does the kinetic energy of an object depend on?
Its mass and speed.
What is gravitational filed strength measured in?
N/kg
What is the conservation of momentum?
When, in a closed system, the total momentum before an event is equal to the total momentum after the event.
What is momentum measured in?
kg m/s
