Calculating Escape Speed, Lagrange Points, & Stress/Strain of Rope

In summary, the conversation discusses three different problems involving calculations related to gravity, equilibrium points, and stress and strain on a rope. The first problem involves determining the escape speed of a rocket on the far side of Ganymede, taking into account the gravitational effect of Jupiter. The second problem involves finding the Lagrange point for the Earth-Sun system and its significance, using quadratic equations. The third problem involves calculating the lengthening, stress, and strain of a nylon rope used by a climber based on their position on the rope and the material's Young's modulus.
  • #1
Meistro
5
0
1: Determine the escape speed of a rocket on the far side of Ganymede, the largest of Jupiter's moons. The radius of Ganymede is 2.64 X 10^6m, and its mass is 1.495 X 10^23 kg. The mass of Jupiter is 1.90 x 10^27 kg, and the distance between Jupiter and Ganymede is 1.071 X 10^9m. Be sure to include the gravitational effect due to jupiter, but you may ignore the motion of Jupiter and Ganymede as they revolve about their center of mass. (U = -GMm/r)

2: In 1772, the famed Italian-French mathematician Joseph Louis Lagrange was working on the infamous three-body problem when he discovered an intersting quirk in the results. If one mass is much smaller than the other two then there will exist points where this object can be stationary with respect to one of the two masses. These points are known as Lagrange points in his honor. In our treatment we could consider these points to be equilibrium points for a system. If we wanted to find Lagrange point for the Earth-Sun system located between the Earth and the Sun how far from the Earth is this point and what is the significance of the other solution? The mass of the Earth is 5.98 X 10^24 kg, the mass of the Sun is 1.991 x 10^30 kg and the radius of the Earth's orbit is 1.496 x 10^11 m. (solve using quadratic eq.)

3: A climber and her gear have a combined mass of 85.0kg. If she uses a 48.0m legnth of nylon rope with a 1.00cm diameter to climb the cliff face, how much is the rope lengthened when she is at the bottom of the rope and what is the stress and strain on the rope? Now find the same things when she is halfway up the length of the rope? Neglect the mass of the rope in this problem. Young's modulus for nylon is 5.00 x 10^9 N/m^2.
 
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  • #2
I just read the sticky (guess I should have read before posting, lol). These questions are from a friend of mine and he offered me some money if I could help him so I thought I'd go to you guys but I realize now that you don't do homework you just help with it so I will try to figure it out. Next time I guess I will read the sticky first.
 

Related to Calculating Escape Speed, Lagrange Points, & Stress/Strain of Rope

1. What is escape speed and how is it calculated?

Escape speed is the minimum speed required for an object to break free from the gravitational pull of a larger object, such as a planet or moon. It is calculated using the formula v = √(2GM/r), where G is the gravitational constant, M is the mass of the larger object, and r is the distance between the two objects.

2. What are Lagrange points and how are they calculated?

Lagrange points are five points in a two-body system where the gravitational forces of the two objects cancel each other out, allowing for a third object to maintain a stable position. These points are calculated using complex equations that take into account the masses, distances, and velocities of the two objects.

3. How is stress and strain of a rope measured?

Stress is a measure of the internal forces acting on a material, while strain is a measure of the material's deformation under stress. The stress and strain of a rope can be measured using a tensile test, where the rope is pulled until it breaks, and the amount of force applied and the resulting deformation are recorded.

4. What factors can affect the stress and strain of a rope?

The stress and strain of a rope can be affected by factors such as the material and thickness of the rope, the amount of force applied, the temperature, and the presence of any defects or weak points in the rope.

5. How can the stress and strain of a rope be reduced?

The stress and strain of a rope can be reduced by using a thicker and stronger rope, distributing the load evenly along the rope, minimizing any sharp bends or kinks, and frequently inspecting and replacing worn or damaged sections of the rope.

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