1.22

 

1.22

Tuesday, July 06, 2010

3:04 PM

·        1.22 use the conservation of momentum to calculate the mass, velocity or momentum of objects

Momentum conserved in collisions

	<<AirTrack simulation.swf>>
			and 1.20 animation

Momentum conserved in explosions

			<<newtons_cradle[1].swf>>
	<<N3L - Every action has a Gun fire.mpeg>>

Example - Pearson, p.41

 

Consider final momentum

 

Truck, plasticine and pellet

p = m x v

p = (0.1+0.002) x 0.8

p = 0.0816kgm/s

 

total final momentum = p_f = 0.0816kgm/s   

 

Principle of Conservation of Momentum tells us:

total initial momentum = total final momentum

                               Σp_i = Σp_f

 

so total initial momentum = p_i = 0.0816kgm/s

 

 

Consider initial momentum

 

Truck and plasticine   

p = m x v

p = 0.1 x 0

p = 0kgm/s 

 

Pellet   

p = m x v

0.0816 = 0.002 x v

v = 40.8m/s

 

 

1.22 animation

14 March 2012

15:49

 

Website:

http://www.walter-fendt.de/ph14e/collision.htm

 

Embed code for your blog:

 

Example:

http://maddog11physics.posterous.com/conservation-of-momentum-animation#

newtons_cradle[1].swf Download this file

AirTrack simulation.swf Download this file