P8 Flashcards
What is displacement
Distance given in a direction
Whats a vector quantity
Physical quantity which has magnitude and direction
What is a a scalar quantity
Mahnitude but no direction
What are forces?
Forces can change the shape of an object, or change its motion or its state of rest.
What is the unit of force
Newtons (N)
What is a contact force
contact force is a force that acts on objects only when the objects touch each other.
What is the resultant force
The resultant force is a single force that has the same effect as all the forces acting on an object.
What’s a free body diagram
free body force diagram of an object shows the forces acting on it.
What is the centre of mass?
The centre of mass of an object is the point where its mass can be thought of as being concentrated.
The parallelogram of forces
The parallelogram of forces is a scale diagram of two force vectors.
