Dynamics Flashcards
(9 cards)
1
Q
What is Newton’s First Law of Motion?
A
A particle remains at rest or continues to move in a straight line if no unbalanced force is acting
2
Q
What is Newton’s Second Law?
A
The acceleration of a particle is proportional to the resultant force acting on it and in the direction of the force
3
Q
What is Newton’s Third Law?
A
The force of action and reaction between contacting bodies is equal in magnitude, opposite in direction and colinear
4
Q
What are the steps do drawing a Freebody Diagram?
A
- Decide which system to isolate
- Isolate chosen system by drawing a diagram which represents its complete external boundary
- Identify all forces that act on the system and represent them in their proper location
- Define a coordinate axis
5
Q
What is larger, dynamic friction or stiction?
A
Stiction - harder to get something to move than accelerate it while moving
6
Q
What is friction proportional to?
A
The normal force
7
Q
What is the strategy for tackling connected bodies questions?
A
- No real fast way / shortcuts
- Draw FBD
- Label forces, define NSL equations for each body
- Apply Newtons 3rd law
- Consider the motion, accelerations not equal
8
Q
WRITE SUVAT EQUATIONS ON CHEAT SHEET
A
9
Q
A
