P8 Flashcards
What is displacemetn?
The distance in a given direction
What is vector quantity
A physical quantity that has a magnitude and a quantity
What is a scalar quantity
Has a magnitude but no direction
What can a force do?
A force can change the shape of an object or change it motion or state
What is the unit for force?
N
What happenes when two objects interact
They always exert equal and oppoosite forces
What is the reultant force?
A single force that has the same effect as all the forces acting on the object
What happens when the resultant force on an object is zero
The object stays at rest or at the same speed and irection
What is the centre of mass of an object?
The point where its mass can be thought of as being concentrated
Where is the centre of mass of a uniform ruler
At its mid point
