Acceleration  due  to gravity  How  to determine g=9.8m/t*t Now I have two methed
Methed 1 <ul><li>G=weight/mass </li></ul><ul><li>To measure weight we can use newton meter or spring balance  </li></ul><u...
Methed 2 <ul><li>g=4 π  * π h /  t*t </li></ul><ul><li>Measure h we can use rule  </li></ul><ul><li>Measure t we can use s...
picture <ul><li>The picture </li></ul>
graph <ul><li>gradient=L/T*T </li></ul><ul><li>g=4 π*π*the gradient </li></ul>
errors <ul><li>Air resistance will cause T get small g will get big </li></ul><ul><li>Reading the number of L too samll(bi...
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AS3/ Expt-g/ Sweet

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AS3/ Expt-g/ Sweet

  1. 1. Acceleration due to gravity How to determine g=9.8m/t*t Now I have two methed
  2. 2. Methed 1 <ul><li>G=weight/mass </li></ul><ul><li>To measure weight we can use newton meter or spring balance </li></ul><ul><li>To measure mass we can use common balance </li></ul><ul><li>a)two pan balance </li></ul><ul><li>b)moment balance </li></ul><ul><li>But it is not a good methed </li></ul>
  3. 3. Methed 2 <ul><li>g=4 π * π h / t*t </li></ul><ul><li>Measure h we can use rule </li></ul><ul><li>Measure t we can use stop watch </li></ul><ul><li>Then we should draw table with </li></ul><ul><li>L/m </li></ul><ul><li>time for 20 oscillation/s </li></ul><ul><li>T=t/20/s </li></ul><ul><li>l/T*T </li></ul>
  4. 4. picture <ul><li>The picture </li></ul>
  5. 5. graph <ul><li>gradient=L/T*T </li></ul><ul><li>g=4 π*π*the gradient </li></ul>
  6. 6. errors <ul><li>Air resistance will cause T get small g will get big </li></ul><ul><li>Reading the number of L too samll(big) g will get small(big) </li></ul>

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