Posted by anonymous on Friday, November 1, 2013 at 9:21am.
Two skaters of mass m1=50 kg and m2=70 kg are standing motionless on a horizontal ice surface. They are initially a distance L= 8.0 meters apart. They hold a massless rope between them. After pulling the rope, the skater of mass m1 has moved a distance l= 2.0 meters away from his initial position. We can completely neglect friction in this problem.
What is the distance L′ between the two skaters when the skater of mass m1 has moved a distance l? (in meters)

physics(IMPORTANT)  bobpursley, Friday, November 1, 2013 at 9:41am
The cneter of gravity has to remain at the same point.
measuring from the center of gravity point, then if d is the distance the m1 is frm the cg, then
50d=70(8d) and after the jerk, then we know
50(d2)=70(L'(d2)
you have two equations, two unknowns
solve the first equation for d
50d=56070d
120d=560
d= 4 2/3
now the second equation..
50(d2)=70(L'd+2)
50(2 2/3)=70L' 70(4 2/32)
L'= 120(2 2/3)/70=4.7 m check my math, done in my head.
Answer This Question
Related Questions
 Physics(IMPORTANT)  Two skaters of mass m1=50kg and m2=70kg are standing ...
 physics  Two skaters with masses of 66kg and 47kg , respectively, stand 5.5m ...
 Biomechanics  Two ice skaters start out motionless in the center of an ice rink...
 Physics  A 100kg mass is connected to a 200kg mass by a massless rope. The two ...
 physics  A light rope is attached to a block with a mass of 6 kg that rests on ...
 Physics  A trapeze artist weighs 8.00 x 10^2 N. The artist momentarily held to ...
 Physics  an ice skater with a mass of 80kg pushes off against a second skater ...
 physics  A block of mass M = 6.755 kg is pulled along a horizontal frictionless...
 physics  A sled loaded with bricks has a total mass of 23.0 kg and is pulled at...
 Physics  Two masses, m1 = 25.0 kg and m2 = 45.0 kg, are attached by a massless ...
More Related Questions