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Description 

 

This apparatus allows single-direction motion to 
be  studied  whilst  virtually  eliminating  friction 
thanks to the air cushion technique.  
This  consists  of  creating  a  thin  cushion  of  air 
between  2  flat  parts  (track  and  glider)  and 
raising  the  glider  slightly,  thereby  eliminating 
friction.  To  achieve  this,  compressed  air  is 
injected  into  the  cavity  underneath  the  track, 
which  has  small  holes  all  along  its  length  (cf. 
diagram opposite). 
 

Setting up and use 

 

1-

 

Basic setup 
 

-

 

Take  the  track  out  of  the  cardboard 
tube. 

Fix 

the 

adjustable 

feet 

underneath  the  track  at  either  end 
(foot alone on one side and adjusting 
bar on the other). 

 

-

 

Place the spirit level on the glider and place 
the glider on the track. Then adjust until the 
glider  is  perfectly  horizontal  by  turning  the 
adjusting screws. 

 

 

-

 

Connect the hose to the track inlet. 
Unscrew the plug, slide it onto the hose 
with the white flange. 
Screw the plug onto the fitting. 
 

 

Summary of Contents for DM241013

Page 1: ...INSTRUCTIONS FOR USE Air track DM241013 Track accessories DM241014 Air blower DM241016 Electromagnetic launcher...

Page 2: ...inelastic collisions 2x2 g 2 photogate brackets 2 barrier rods for photogates 0 8 g 1 pulley holder with thread for accelerometer 1 elastic launcher 1 brake 1 connection hose 1 spirit level DM241014 A...

Page 3: ...nderneath the track which has small holes all along its length cf diagram opposite Setting up and use 1 Basic setup Take the track out of the cardboard tube Fix the adjustable feet underneath the trac...

Page 4: ...blower power until it moves without any friction Stop the glider and finely adjust the horizontality of the track so that the glider no longer moves Fit the glider brake on the end cover side Fit the...

Page 5: ...ider OPERATION Place the launcher accessory against the launcher compressing the spring Press the button to hold the glider in position When you let go of the button the glider is released and propell...

Page 6: ...ckets Put the photogate barrier rods on the gliders Pass the glider under the photogate to check that it cuts through the beam without touching the sensor If it does not adjust the sensor height Conne...

Page 7: ...launch Place the photogates x mm apart and measure the glider s travel time between the 2 photogates Repeat the operation moving the 2 photogates further along the track keeping the x mm gap between t...

Page 8: ...m apart and measure the glider s travel time between the 2 photogates Repeat the operation 3 times moving the 2 photogates X mm further along the track keeping the x mm gap between them This demonstra...

Page 9: ...efore the impact This gives you the initial momentum 0 1 0 Measure the velocity of the first glider after the impact To do this place the photogates after the second glider from which barrier rod has...

Page 10: ...Air track 10 This demonstrates that the momentum is conserved 0 1 2 In addition as the kinetic energy is conserved 1 2 1 2 0 1 2 1 1 2 2 This gives 1 0 1 2 1 2 2 0 2 1 1 2...

Page 11: ...the track Measure the velocity of the first glider before the impact This gives you the initial momentum 0 1 0 Measure the velocity of the 2 glider assembly after the impact To do this place the phot...

Page 12: ...art and measure the glider s travel time between the 2 photogates Repeat the operation 3 times moving the 2 photogates X mm further along the track keeping the x mm gap between them This demonstrates...

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