Module 3 - Forces and motion (Dynamics)

Question 1

What are the 7 most Common forces

Answer 1

Weight
Friction
Drag
Tension
Upthrust
Normal contact force
Lift

Question 2

What is weight

Answer 2

The gravitational force acting on an object through its centre of mass

Question 3

What is friction

Answer 3

The force that opposes the motion of an object when 2 objects rub together

Question 4

What is drag

Answer 4

The resitive force on an object travelling through a fluid

Question 5

What is tension

Answer 5

Force within a stretchable object

Question 6

What is upthrust

Answer 6

The upward buoyancy force acting on an object in a fluid

Question 7

What is the normal contact force

Answer 7

A force arising when an object is in contact with another

Question 8

What is lift

Answer 8

The upwards force on an wing caused by presssure differences

Question 9

What is Newton’s 2nd Law assuming constant mass

Answer 9

The resultant force on an object is directly proportional to the acceleration of the object.

Question 10

What equation links to Newton’s 2nd Law assuming constant mass

Answer 10

Resultant Force (F) = Mass (m) x Acceleration (a)