Your friend say that momentum conservation means that the total momentum in a sy
ID: 1622620 • Letter: Y
Question
Your friend say that momentum conservation means that the total momentum in a system is constant. How would this statement so that it is more accurate? (b) In an isolated system with two interacting objects, what is the relationship between the impulses that the two object each other? (c) Two ice skaters, Anna and Hans are doing a routine on the (very frictionless) ice. Hans is at rest and Anna The two of them then drift together. Hans is is about 2 times Anna's mass. What is the ratio of their final speed to Anna's [give your answer as a fraction with their final speed in the numerator and Hans as the denominator]? Imagine a device that shoots out 1 kg pellets. It is equipped with 10 such pellets. The rest of the device has a mass of consists of a tube and the launcher system that propels the pellets out at a speed of 10 m/s relative to the device. Assume device is being operated in the vacuum of deep space. (x1) If the device starts at rest, how fast does it move after launching the first pellet? (x2) How fast is it moving after the second pellet is launched? (x3) How fast will the device be moving after it has launched all of its pellets? (a) Which combination of energies remains constant when two isolated objects collide elastically? (b) What are the four categories of energy that make up the total energy of a system? Give a brief description of each (c) You fire a 30 gram rock from ground level using a slingshot. The rock went 4 meters straight up when you released the stretching the rubber band 20 cm.Explanation / Answer
T2
(a) The total momentum is constant if there are no external froces acting on the system
(b) The magnitude of the impuse will be the same but direction will be opposite.
(c) Let 'u' be the initial velocity of anna and 'v' be the velocity with which they drift together
Mass of anna = m
Mass of Hans = 2m
Applying conservation of momentum,
(m)(u) = (m + 2m)v
=> v = u/3
=> v/u = 1/3
Related Questions
Hire Me For All Your Tutoring Needs
Integrity-first tutoring: clear explanations, guidance, and feedback.
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.