Physics, 15.05.2021 23:30 devinluck100
The car observer measured initial energy as 0.5*5*6*6 Joules = 90 J and final energy as 0.5*5*(-3)*(-3) + 0.5*30*(+1.5)*(+1.5) Joules = 56.25J with a loss of Joules. The sidewalk pedestrian observer reported an initial energy of 0.5*5*(+4)*(+4) + 0.5*30*(-2)*(-2) = 100 J and final energy as 0.5*5*(-5)*(-5) + 0.5*30*(-0.5)*(-0.5) = 66.25J with a loss of Joules. The arithmetic showed that the total kinetic energy loss to heat, sound, etc. of the two-object system (impactor-target system) is the s for both observers, just like the exchange impulse of 45 N-sec is the s for both observers.
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Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.
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The car observer measured initial energy as 0.5*5*6*6 Joules = 90 J and final energy as 0.5*5*(-3)*(...
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