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Author Question: If, instead of the correct formula for kinetic energy, we carelessly use the classical expression ... (Read 46 times)

ahriuashd

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on: Jul 29, 2018
If, instead of the correct formula for kinetic energy, we carelessly use the classical expression for kinetic energy for a particle moving at half the speed of light, by what magnitude percent will our calculation be in error? (c = 3.0  108 m/s)
 
  A) 24
  B) 19
  C) 27
  D) 7
  E) 1

Question 2

A small ball is tied to one end of a light 2.5-m wire, and the other end of the wire is hooked to the ceiling. A person pulls the ball to the side until the wire makes an angle of 35 with the plane of the ceiling and then gently releases it.
 
  What is the angular speed of the ball, in rad/s, as it swings through its lowest point?
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izzat

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Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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ahriuashd

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Reply 2 on: Jul 29, 2018
YES! Correct, THANKS for helping me on my review

Kedrick2014

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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