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• seow

  12 Feb 08, 17:50

  http://i26.photobucket.com/albums/c146/seow/example.jpg No other info was given. Any help will be appreciated, many thanks!
• Darkness_hacker99

  12 Feb 08, 22:07

  erm... try

  h= v^2/ 2g

  Source

• wishboy

  12 Feb 08, 22:09

  wa the pic make ppl strain eyes

  anyway,

   

  Taking g = 10m/s²,

  By the principle of conservation of energy,

  change in KE = change in PE

  ½ mv² = mgh

  ½ (8)² = 10h

  32 = 10h

  h = 3.2 m

   

  someone check my ans cos might be wrong, haven touch energy for quite long liao

• eagle

  12 Feb 08, 23:01

  using v^2 = u^2 + 2as

  a = 10
  v = 8
  u = 0
  so s = v^2 / 2a (darkie's formula)
  you get answer = 3.2m

  Alternatively, you can also use wishboy's method of COE

• seow

  12 Feb 08, 23:35

  Many Thanks!! KUM SIA!