Homework Help Forum: college physics

Posted by sara on Wednesday, October 28, 2009 at 3:34pm.

two people are wearing harnesses and are hanging from the ceiling by means of ropes. they are face to face and push off eachother. person 1 has a mass of 100kg and person 2 a mass of 80 kg. after the push person 1 swings in an arc that causes hime to rise a height of .3 meters. what height does person 2 rise above his starting position?

• college physics - bobpursley, Wednesday, October 28, 2009 at 4:00pm

  both have the same momentum at pushing 80v2=100v1 v2=1.25v1 square it v2^2=1.56v1^2 so, so the energy in person1 is m1v1^2 and the energy in person1 is m2v2^2 but m2*g*h2=1/2 m2v2^2=1/2 m2*1.56v1^2 = 1/2*4/5m1v1^2*1.56 = initialKEperson1 * .8*1/56 = m1g*h1*1.25 h2/h1=m1/m2*1.25 =1.25^2=1.56 or h2= 3*1.56meters check my thinking.

  
  

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