You and your friends are doing physics experiments on a frozen pond that serves as a frictionless, horizontal surface. Sofia, with mass 78.0 kg , is given a push and slides eastward. Elena, with mass 52.0 kg , is sent sliding northward. They collide, and after the collision Sofia is moving at 32.0 ∘∘ north of east with a speed of 6.20 m/s and Elena is moving at 19.0 ∘∘ south of east with a speed of 9.40 m/s . By how much did the total kinetic energy of the two people decrease during the collision?
You and your friends are doing physics experiments on a frozen pond that serves as a frictionless, horizontal surface. Sofia, with mass 78.0 kg , is given a push and slides eastward. Elena, with mass 52.0 kg , is sent sliding northward. They collide, and after the collision Sofia is moving at 32.0 ∘∘ north of east with a speed of 6.20 m/s and Elena is moving at 19.0 ∘∘ south of east with a speed of 9.40 m/s . By how much did the total kinetic energy of the two people decrease during the collision?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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You and your friends are doing physics experiments on a frozen pond that serves as a frictionless, horizontal surface. Sofia, with mass 78.0 kg , is given a push and slides eastward. Elena, with mass 52.0 kg , is sent sliding northward. They collide, and after the collision Sofia is moving at 32.0 ∘∘ north of east with a speed of 6.20 m/s and Elena is moving at 19.0 ∘∘ south of east with a speed of 9.40 m/s .
By how much did the total kinetic energy of the two people decrease during the collision?
(I keep getting ~ -118.3 and it says this is wrong. Before the collision I calculated their speeds as Vs = 11.2 and Ve = 1.87)
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