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
· http://www.youtube.com/watch?v=b6QzJSUKzQM
· and http://www.walter-fendt.de/ph14e/collision.htm

>

>

Momentum conserved in explosions

>

Example - Pearson, p.41

[cid:image001.jpg@01CD076A.F1E42140]

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 = pf = 0.0816kgm/s

Principle of Conservation of Momentum tells us:

total initial momentum = total final momentum

Σpi = Σpf

so total initial momentum = pi = 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#

1.22 Plenary questions

13 March 2012

15:20

Physics for You p.147 Q1g+h, 3+4

1

[cid:image002.jpg@01CD076A.F1E42140]

[cid:image003.jpg@01CD076A.F1E42140]

[cid:image004.jpg@01CD076A.F1E42140]

newtons_cradle[1].swf Download this file

AirTrack simulation.swf Download this file

See the full gallery on Posterous