Forces, Vector diagrams and moments Flashcards
1
Q
What is a vector
A
A quantity that has both size and direction
2
Q
What is a scalar
A
A quantity that only has magnitude.
3
Q
Name a contact force
A
friction
push
pull
4
Q
Name a non-contact force
A
Gravity
magnetic fields
static feilds
5
Q
What is a free body force diagram
A
arrows around an object that represent the direction of force
6
Q
What is resultant force
A
The overall force acting on an object
7
Q
Key factors in drawing a vector diagram
A
to scale and has a key e.g 1cm = 1N
accounts for the angle
Make sure to show the force to scale instead of just pythagora’s theory
8
Q
What’s the formula for a moment of a force
A
moment of a force (Nm) = force(N) x distance (m)
