Download Ch 14 Kinetics of Particles Work and Energy PDF

TitleCh 14 Kinetics of Particles Work and Energy
Tags Nature Acceleration Quantity Potential Energy
File Size953.4 KB
Total Pages19
Document Text Contents
Page 2

This work is the area under the force deflection
curve. It is stored in the spring as a potential energy

Example:
The force F is constant

F



dr
2s1s

2 2

1 2

1 1

2 1

. cos( ) cos( )

cos( )

U d F dr F L

F L T T

 



   

 

 F r

x

P kx
k

( )P x

1x 2
x

x

Work done by Spring Force

,2 ,1

2 2
2 2

1 2 2 1
.1 1

1 1
. .

2 2

s s

kx dx
V V

U d kx dx kx kx     
i i

F r

sV

21
( )

2
sV x kx

The work done by a spring force is

(elastic energy),.

The amount of the work done on (by) the spring depends on
the initial and final points not on the followed path, All
forces whose work do not depend on the path of motion
are called conservative forces.

2y

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