PHY 231
Your 'cq_1_11.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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Answer the following based on Newton's Second Law:
• How much net force is required to accelerate a 12 kg mass at 3 m/s^2?
answer/question/discussion: ->->->->->->->->->->->-> :
F = MA
F = 12 kg * 3 m/s^2
F = 36 Newtons
#$&*
• What would be the acceleration of a 4 kg mass subject to a net force of 20 Newtons?
answer/question/discussion: ->->->->->->->->->->->-> :
F = MA
20 N = 4 kg * A
5 m/s^2 = A
#$&*
• If you exert a force of 20 Newtons on a 10-kg object and it accelerates in the direction of your force at 1.5 m/s^2, then how do you know there are other forces acting on the object besides your own?
answer/question/discussion: ->->->->->->->->->->->-> :
F = MA
20 N = 10 kg * A
.5 m/s^2
The object is accelerating at a greater rate than projected. Thus, there must be another unmentioned force ( like a wind breeze, interaction between surfaces of object and where it is located, etc. ) for it to be moving nearly at a rate more than triple its projection according to the formula.
#$&*
• What is the total of all those forces and in what direction does this total act?
answer/question/discussion: ->->->->->->->->->->->-> :
The 30 N net force acts in the direction of the force applied, enabling the object to accelerate at 1.5 m/s^2.
Calculations:
( Additional Force )
F = MA
F = 10 kg * 1 m/s^2 ( 1.5 m/s^2 - .5 m/s^2 )
F = 10 N
20 N ( Known Force ) + 10 N ( Unknown Force ) = 30 N
#$&*
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Copy and paste your work into the box below and submit as indicated:
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8 Minutes
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Very good, but you went a little too far on the last question. No need for a revision unless you have questions.
&#See any notes I might have inserted into your document. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified.If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#