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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• How much net force is required to accelerate a 12 kg mass at 3 m/s^2?
answer/question/discussion: ->->->->->->->->->->->-> : 12kg * 3m/s^2 = 36N
• What would be the acceleration of a 4 kg mass subject to a net force of 20 Newtons?
answer/question/discussion: ->->->->->->->->->->->-> : 20N = 4kg * a = 20N/4kg = 5m/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: ->->->->->->->->->->->-> : 10kg * 1.5m/s^2 = 15N, so there must be -5N acting on the object.
• What is the total of all those forces and in what direction does this total act?
answer/question/discussion: ->->->->->->->->->->->-> : The total is 15N; 20N + (-5N). I’m not sure what you mean by “in what direction”? It must be acting in the direction of the motion of the object.
A -5 N force would be acting in the direction opposite the motion.
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5 minutes
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Good work, but be sure to see the discussion at the link below. No revision is necessary.
&#Please compare your solutions with the expanded discussion at the link
Solution
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