physics(IMPORTANT)

posted by .

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) -

    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(8-d) and after the jerk, then we know
    50(d-2)=70(L'-(d-2)

    you have two equations, two unknowns

    solve the first equation for d
    50d=560-70d
    120d=560
    d= 4 2/3
    now the second equation..
    50(d-2)=70(L'-d+2)
    50(2 2/3)=70L' -70(4 2/3-2)

    L'= 120(2 2/3)/70=4.7 m check my math, done in my head.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A light rope is attached to a block with a mass of 6 kg that rests on a horizontal, frictionless surface. THe horizontal rope passes over a frictionless, massless pulley, and a block of mass m is suspended from the other end. When …
  2. Physics

    an ice skater with a mass of 80kg pushes off against a second skater with a mass of 32kg. both skaters are initially at rest. a. what is the total momentum of the system after the push off?
  3. Physics

    A 100kg mass is connected to a 200kg mass by a massless rope. The two masses rest on a frictionless surface. A (massless)rope is then attached to the 200kg mass, and is pulled. The two mass system accelerates. What is the relationship …
  4. Physics

    A trapeze artist weighs 8.00 x 10^2 N. The artist momentarily held to one side of a swing by a partner so that both of the swing ropes are at an angle of 30ยบ with the vertical. In such a condition of static equilibrium, what is the …
  5. physics

    A block of mass M = 6.755 kg is pulled along a horizontal frictionless surface by a rope of mass m = 0.592 kg, as shown in Fig. 5-63. A horizontal force = 41.5 N is applied to one end of the rope. Assume that the rope only sags a negligible …
  6. physics

    A sled loaded with bricks has a total mass of 23.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 12.0 m on a horizontal surface. The coefficient of kinetic friction …
  7. Physics(IMPORTANT)

    Two skaters of mass m1=50kg and m2=70kg are standing motionless on a horizontal ice surface. They are initially a distance L=7.0 meters apart. They hold a massless rope between them. After pulling the rope, the skater of mass m1 has …
  8. physics

    Two skaters with masses of 66kg and 47kg , respectively, stand 5.5m apart, each holding one end of a piece of rope. Part A If they pull themselves along the rope until they meet, how far does each skater travel?
  9. Biomechanics

    Two ice skaters start out motionless in the center of an ice rink. They then push each other apart. The first skater (mass = 80 kg) moves to the right with a velocity of 2.5 m/s. The second skater (mass = 58 kg) moves to the left at …
  10. Physics

    Two masses, m1 = 25.0 kg and m2 = 45.0 kg, are attached by a massless rope over a massless pulley. The angle of the frictionless incline is α = 27.00. Assume that m2 starts at rest and falls a vertical distance of 3.00 m. Assume …

More Similar Questions