Phy 121
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: ->->->->->->->->->->->-> : 36 Newtons
F = m * a
F = 12 kg * 3 m/s^2
F = 36 kg * m/s^2 = 36 Newtons
• What would be the acceleration of a 4 kg mass subject to a net force of 20 Newtons?
answer/question/discussion: ->->->->->->->->->->->-> : 5 m/s^2
F = m * a
20 N = 4 kg * a
20 kg * m/s^2 / 4 kg = a
A = 5 m/s^2
• 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: ->->->->->->->->->->->-> : 20 kg * 1.5 m/s^2 equals 30 Newtons of net force so there must be 10 Newtons of force helping the 20 Newtons of exerted force
F = m * a
20 N = 20 kg * 1.5 m/s^2
• What is the total of all those forces and in what direction does this total act?
answer/question/discussion: ->->->->->->->->->->->-> : The total of all forces is 30 Newtons acting in the direction of the object
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5 minutes
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Good, but check the link on that last question:
&#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. &#