Dynamics

doutfanaticalΜηχανική

14 Νοε 2013 (πριν από 3 χρόνια και 8 μήνες)

108 εμφανίσεις

Dynamics

of

Mechanical Systems

MST @ MSU

2006


Jeff Rhoads and Terry Ballinger

Outline


What is Dynamics?


Kinematics


Kinetics


Newton’s Second Law


Today’s Activity

What is Dynamics?

What is Dynamics?


Scientific Definition

A scientific discipline that deals with
systems

undergoing change

What is Dynamics?


Scientific Definition


Engineering Definition

A scientific discipline that deals with
systems

undergoing change

Deals with the relationship between
forces

and
motion

of mechanical systems

What is Dynamics?

Dynamics

What is Dynamics?

Dynamics

Kinematics

What is Dynamics?

Dynamics

Kinematics

The study of
motion

(mathematical construct)

What is Dynamics?

Dynamics

Kinetics

Kinematics

The study of
motion

(mathematical construct)

What is Dynamics?

Dynamics

Kinetics

Kinematics

The study of
motion

(mathematical construct)

Relates
forces

and
motion

(based on physical law)

Kinematics


The study of
motion

Kinematics


The study of
motion

Position
Velocity
Acceleration

Kinematics

Position

Velocity
Acceleration


The study of
motion

Spatial
Location



Origin

Object

Kinematics

Position

Velocity

Acceleration


The study of
motion

Rate of change of
position

(movement, can see it)

Kinematics

Position
Velocity

Acceleration


The study of
motion

Rate of change of
velocity
(can feel it)

Kinetics


Relates
forces

and
motion

Kinetics


Relates
forces

and
motion

Newton’s Second Law

Kinetics


Relates
forces

and
motion

Newton’s Second Law

F
o
r
c
e

M
a
s
s

A
c
c
e
l
e
r
a
t
i
o
n
Kinetics


Relates
forces

and
motion

Newton’s Second Law

F
o
r
c
e

M
a
s
s

A
c
c
e
l
e
r
a
t
i
o
n












A
c
t
i
o
n











R
e
s
i
s
t
a
n
c
e


























M
o
t
i
o
n
Kinetics


Relates
forces

and
motion

Newton’s Second Law

F
o
r
c
e

M
a
s
s

A
c
c
e
l
e
r
a
t
i
o
n












A
c
t
i
o
n











R
e
s
i
s
t
a
n
c
e


























M
o
t
i
o
n
F

m
a
Today’s Activity

Popsicle Stick Slingshot

Objective

Create a slingshot that will propel a ping pong ball as far as
possible.

Design Considerations


Convert as much of the rubber band (elastic
potential) energy into kinetic energy of the ball.


Have a strong and stable enough structure to support
the force of the rubber band.


What is the best possible way to launch the ball?