Multiple Choice
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
Correct Answer:
Verified
Correct Answer:
Verified
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