1.5 Forces Flashcards
Define the spring constant
Force per unit extension
What is the formula for spring constant
k=F/x
Define the term ‘limit of proportionality’
The maximum point on the graph up to which Hooke’s law is obeyed.
Define moment
The rotational effect of a force on a body about a fixed point or axis.
What is the formula for moment
Force times perpendicular distance
What is the principle of moment
When a body is balanced, the total clockwise moment is the same as the total anticlockwise moment.
What is meant by centre of gravity
A point at which the whole or mass or weight of an object is assumed to be concentrated.
What is Hooke’s Law
The extension of a spring is directly proportional to the force applied, provided that the limit of proportionality is not exceeded.
