P4 pt2 Flashcards
What is mass
It is the amount of matter in an object. It is constant for an object everywhere
What is the equation of weight
MWG Weight=mass x gravity
What is the value for gravitational field strength on earth?
9.8N/KG
What is a resultant force?
A single force that has the same effect as all forces acting together
What is work done?
It is an energy transfer. One joule of work is done when a force of one newton causes a displacement of one metre
Work done equation
FWD work done= force x distance
What does work done against frictional forces cause?
A rise in temperature of an object
What is elastic deformation
When an object is stretched but can still return to its original size
What is inelastic deformation
When an object is stretched but cannot return to its original size
Hooke’s law equation
KFE Force=spring constant x extension
What type of energy is stored in a stretched spring?
Elastic potential energy
What is the relationship between force applied and the extension of an elastic object
The force applied is directly proportional to the extension of an elastic object
One newton metre=
One joule
