Mechanics Flashcards
3 basic dimensions
-length
-mass
-time
Length, Mass, Time units
meters,kilograms, seconds
Force (definition)
-effect of one body on another
-a push or pull applied to an object
-that which is needed to change the state of motion of an object
Force (unit)
Newtons
1kgx1m/s
Force (equation)
F=ma
Internal Force
From within the system
External force
from outside of the system
Scalar
Magnitude only (number and unit)
length
speed
volume
temp
mass
Vector
Magnitude and direction (number,unit, direction)
force
velocity
acceleration
torque
Types of motion
1 linear
-rectilinear
-curvilinear
2 angular
3 General
Linear motion
translation of the body in which all parts of the body travel in the same direction at the same time
Rectilinear Motion
straight line (running)
Curvilinear motion
curved line (sky diving)
Angular motion
all parts of the body travel through the same angle, in same direction at same time
E.G. hands on a clock, high bar gymnastics, leg left
General motion
combination of linear and angular
e.g. wheels turning in the car results in linear motion
Mechanics categories
Statics
Dynamics
Fluids
Dynamic Mechanics
Kinematics and Kinetics
Kinematics
Linear and Angular
Kinetics
Linear and angular
Statics
Study of systems in a constant state of motion (at rest or at constant velocity without accel)
Dynamics
Study of systems in a changing state of motion (includes acceleration)
Kinematics
Description of motion (how fast how far etc)
-displacement, velocity, accel.
Linear Kinematics
Movement along same line with same direction, and speed
Angular Kinematics
rotation about an axis or point
