Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What is a force?
   • A Force is a push or pull that acts on an object due to the interaction with another object.
2. What is the difference between contact and non-contact forces?
   • All Forces between objects are either: - contact Forces - the objects are physically touching - non-contact Forces - the objects are physically separated.
3. What examples are there of contact forces?
   • Examples of contact Forces include friction, air resistance, tension and normal contact Force.
4. What examples are there of non-contact forces?
   • Examples of non-contact Forces are gravitational Force, electrostatic Force and magnetic Force.
5. What is the interaction pair between a book being pushed across a table, where a force is produced on each object?
   • There is an interaction pair of friction Forces between a book being pushed and a table. The book experiences a backwards Force - this will tend to slow it down. The table experiences a forwards Force - this will tend to move it forwards with the book.
6. What is meant by the term ‘vector quantity’ in terms of forces?
   • A Force is a vector quantity. A vector quantity is a value that has both magnitude (size) and direction.
7. What do all vector quantities have?
   • Vector quantities have magnitude and an associated direction.
8. How is an arrow used to represent a vector quantity?
   • A vector quantity may be represented by an arrow. The length of the arrow represents the magnitude, and the direction of the arrow the direction of the vector quantity.
9. How are scalar quantities different from vector quantities?
   • Scalar quantities different from vector quantities as scalar quantities have magnitude only.