P8 Flashcards
What is displacment
Distance in a given direction
What is a vector quantity
A physical quanitiy that has magnitude and direction
What is a scalara quanity
Ha magnitude but no direction.
How can a vector be represented in a diagram
By an arrow in the direction of the vector
What can change the shape of a object or change its motion
A force
What is a contact force
A force that acts on objects only When the objects touch each other
What isa resultant force
A single force that has the same effect as all the forces acting on an object
What happens when the resultant force on an object is zero
The object stays at rest or at the same speed and direction
What happens when the resultant force on an object is greater than zero
The speed or direction will change
Where is the centre of mass of an object
The point where its mass can be thought of as being concentrated
What is the parrallelogram of forces
A scale diagram of two force vectors
What is the parallelogram of forces used to do
Find the resultant of two forces that do not act along the same line
What does the resolving force mean
Finding perpendicular components that have a resultanr force that is equal to the force
