4.3 + 4.4 Free Body Diagrams, Drag & Terminal Velocity Flashcards
1
Q
how can a body be shown to be in equilibrium?
using a free body diagram
A
a triangle of forces
arrows head to tail
2
Q
what is the component of the weight force ?
assuming the block is stationary
A
3
Q
What is the component of the weight force
A
4
Q
what is drag?
A
a resistive force that any body moving through a fluid (air, liquid) experiences, due to the particles in fluid collsion
always opposite the body’s velocity
5
Q
what does the size of the drag force depend on?
A
- shape
- velocity
- viscosity
6
Q
what is terminal velocity?
A
- 0 resultant force
- 0 acceleration
7
Q
define terminal speed
A
the maximum speed attained by a body during freefall, when its weight is balanced by the drag force acting upon it
8
Q
what are the general steps for a body in a fluid with an initial driving force?
A
- body accelerates
- velocity increases
- drag force increases
- resultant force decreases
- acceleration decreases
- Eventually 0 Resultant force, 0 acceleration
- terminal speed attained
