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Author Question: A child does 350 J of work while pulling a box from the ground up to his tree house at a steady ... (Read 85 times)

eruditmonkey@yahoo.com

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on: Jul 29, 2018
A child does 350 J of work while pulling a box from the ground up to his tree house at a steady speed with a light rope. The tree house is above the ground. What is the mass of the box?
 
  A) 8.9 kg
  B) 5.3 kg
  C) 6.7 kg
  D) 8.0 kg

Question 2

Which of the following statements about spherical mirrors is correct? (There could be more than one correct choice.)
 
  A) A concave mirror always produces a real image.
  B) A convex mirror always produces a virtual image.
  C) A concave mirror always produces a virtual image.
  D) A convex mirror always produces a real image.
  E) A convex mirror always produces an upright image.


Brenm

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

A

Answer to Question 2

B, E


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eruditmonkey@yahoo.com

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Reply #2 on: Jul 29, 2018
Thank you!


Brenm

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Reply #3 on: Jul 29, 2018
Always glad to help...


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