forces Flashcards
what is a vector quantity?
force, velocity, displacement, acceleration
what is a scalar quantity?
speed, distance, time, mass
is velocity vector or scalar?
vector
is speed vector or scalar?
scalar
what is a force?
a push or pull on an object that is caused by it interacting with something. they are either contact or non-contact.
what is an interaction pair?
a pair of forces that are equal and opposite and act on two interacting objects
what is mass?
the amount of something in an object
what is weight?
the force acting on an object due to gravity
what is weight measured in?
newtons (N)
what is mass measured in?
kilograms (kg)
equation for weight, mass, gfs
weight = mass x gfs
what is the resultant force?
the overall force on an object
How do you calculate the resultant force?
Subtract the vertical and horizontal values and state the value and direction.
What is the equation for work done?
Force x distance
How do you show the resultant force?
Do a scale drawing using bearings and using a protractor, measure the bearing.
What is an equilibrium?
If all the forces acting on an object combine to give zero
What is elastic deformation?
It can go back to its original shape and length after the force has been removed. They’re called elastic.
What is inelastic deformation?
If the force doesn’t return to its original shape after the force has been removed
How do you work out force?
Spring constant x extension
How do you work out weight?
Mass x gfs
How do you work out elastic potential energy?
0.5 x spring constant x extension^2
