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Author Question: A crane lifts a 425 kg steel beam vertically upward a distance of 95m How much work does the crane ... (Read 219 times)

chads108

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on: Jul 29, 2018
A crane lifts a 425 kg steel beam vertically upward a distance of 95m How much work does the crane do on the beam if the beam accelerates upward at 1.8 m/s2? Neglect frictional forces.
 
  A) 4.0  105 J B) 3.2  105 J C) 4.7  105 J D) 2.7  105J

Question 2

A centrifuge in a medical laboratory rotates at a rotational speed of 3600 rev/min. When switched off, it makes 50 complete turns at a constant angular acceleration before coming to rest.
 
  (a) What was the magnitude of the angular acceleration of the centrifuge as it slowed down?
  (d) How long did it take for the centrifuge to come to rest after being turned off?


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blakeserpa

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Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

(a) 230 rad/s2 (b) 1.7 s


chads108

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Reply 2 on: Jul 29, 2018
Wow, this really help

AmberC1996

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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