Homework Help Forum: 6th grade

Posted by maria on Tuesday, November 3, 2009 at 5:39pm.

a 600 n box is pushed up a ramp that is 2m high and 5 m long, the person is pushing the box at a force of 300 n,what is the efficiency of a ramp ?

• Physics - Ms. Sue, Tuesday, November 3, 2009 at 5:40pm

  This doesn't look like a 6th grade question to me.

  
  

• 6th grade - drwls, Tuesday, November 3, 2009 at 6:15pm

  The gain in potential energy is 600*2 = 1200 J, and this is the minimum required work that would be required in a frictionless situation. The work that actually has to be done is F*X = 300*5 = 1500 J. The efficiency is therefore 1200/1500 = 80%

  
  

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