1.01, 1.11-1.16, 1.18, 1.22-1.24 Fundamentals of Forces

Name the main forces

Gravitational, thrust, friction, air restistance, buoyancy

How do you identify gravitational/weight force?

It is always going down

How do you identify thrust force

Normally with an engine, driving force

How to identify friction force

Always acting against direction of motion

How to identify air resistance/drag?

Force against air movement, caused by collision with air particles

How to identify buoyancy force

Ability float up

What is the difference between vectors and scalars?

Vectors have magnitude and direction, scalars only have magnitude.

What are some examples of vectors?

velocity, acceleration, force, momentum

Name some examples of scalars

Temperature, energy, speed, speed, current

When forces are balanced:

The resultant force is 0, object will move at a constant or not move at all

When a force are unbalanced:

Resultant force is not zero, object will change shape, speed or direction

What is the formula that connects weight, mass and gravitational field strength?

W = m x g

What is Hooke's Law?

Extension is directly proportional to the force applied

What is it called when an object stops obeying hooke's law?

limit of proportionality

Explain elastic behaviour

the ability to recover original shape after the forces causing deformation have been removed.