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Author Question: A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ... (Read 113 times)

captainjonesify

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on: Jul 29, 2018
A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building, assuming negligible air resistance?
 
  A) 20 m
  B) 30 m
  C) 50 m
  D) 70 m

Question 2

A hoop with a mass of 2.75 kg is rolling without slipping along a horizontal surface with a speed of 4.5 m/s when it starts down a ramp that makes an angle of 25 below the horizontal.
 
  What is the rotational kinetic energy of the hoop after it has rolled 3.0 m down as measured along the surface of the ramp? A) 34 J
  B) 22 J
  C) 45 J
  D) 62 J
  E) This question cannot be answered without knowing the radius of the hoop.
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ririgirl15

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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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captainjonesify

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


ririgirl15

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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