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Author Question: A person applies a constant force of 20 N to a rock of mass 1000 kg, for a total of 20 seconds. What ... (Read 52 times)

pane00

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on: Jul 29, 2018
A person applies a constant force of 20 N to a rock of mass 1000 kg, for a total of 20 seconds. What is the work done by this person if the rock does not move at all by this applied force?
 
  A) 1000 J
  B) 2000 J
  C) 20,000 J
  D) 0 J
  E) 400 J

Question 2

The kilogram is currently defined as
 
  A) the mass of a platinum-iridium cylinder kept in Svres, France.
  B) the weight of a platinum-iridium cylinder as measured on the Earth's moon.
  C) the mass of 5.9786332  1026 protons.
  D) the mass of one liter of pure water, free of air, at standard temperature and pressure.
  E) the mass of a cube of pure water, free of air, 10 cm on each side, at standard temperature and pressure.


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bhavsar

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

D

Answer to Question 2

A


pane00

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Reply 2 on: Jul 29, 2018
Excellent

bdobbins

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Reply 3 on: Yesterday
Wow, this really help

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