forces Flashcards
What is the difference between mass and weight?
Mass is just the amount of stuff in an object. It will have the same value anywhere in the universe whereas weight is the force acting on an object due to gravity.
What does the weight of an object depend on?
It depends on the strength of the gravitational field at the location of the object, so the weight of an object changes with its location
what is weight and what is it measured in?
Weight is a force and is measured in newtons
how is weight measured?
using a calibrated spring balance or a Newton meter
are mass and weight directly proportional or inversely proportional
Directly proportional
what is the equation for weight?
Weight is equal to mass x gravity
what happens when a force moves an object through a distance?
Energy is transferred and work is done on the object
What is the equation for work done?
work done is equal to force x distance
how do you convert joules to newton meters?
1 J =1 Nm
what would happen if you applied forced to an object?
It may stretch , compress or bend
how can you tell if an object has been elastically deformed?
If you can go back to its original shape and length after the force has been removed
what do you call objects that have been elastically deformed?
Elastic object like a spring
How do you know if an object has been inelastically deformed?
If it doesn’t return to its original shape and then after the force has been removed
what is extension to force?
Directly proportional
What is the equation for force?
Spring constant x extension
what is a limit of proportionality?
The maximum force when extension is no longer proportional to force
