Forces and there interactions

Question 1

What is vector and give examples ?

Answer 1

Vector quantities have magnitude (size) and direction

Vector quantities - Displacement, weight, force, velocity, acceleration and momentum

Question 2

What is scalar and give examples ?

Answer 2

Scalar quantities have magnitude (size) only. They have no direction

Scalar quantities - Mass, temperature, speed, energy, distance and time

Question 3

What is a contact force and give examples ?

Answer 3

Contact forces are 2 objects physically touching

Examples of contact forces - Friction, air resistance and tension

Question 4

What is a force ?

Answer 4

A push or pull acting on an object due to an interaction with another object

Question 5

What is a non contact force and give examples ?

Answer 5

Non Contact forces are 2 object physically separated

Examples of non contact forces - Gravitational force, electrostatic force and magnetic force

Question 6

What is the difference between mass and weight ?

Answer 6

Mass is a measure of how much matter there is in an object, while weight is a measure of the size of the pull of gravity on the object.

Question 7

Describe the relationship between mass, weight and gravitational field strength

Answer 7

Weight = mass x gravitational field strength

Question 8

Is force a scalar or vector quantity ?

Answer 8

Vector

Question 9

What is meant by an objects centre of mass ?

Answer 9

The single point where an objects weight can be considered to act through

Question 10

What is the resultant force ?

Answer 10

When a system of forces is acting on an object, the difference between the forces is called the Resultant force