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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.
** CQ_1_11.1_labelMessages **
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: ->->->->->->->->->->->-> scussion:
Fnet=m*a
Fnet=12kg*3m/s^2
Fnet=36kg*m/s^2
Fnet=36N
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What would be the acceleration of a 4 kg mass subject to a net force of 20 Newtons?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
Fnet=m*a
20N=4kg*a
20kg*m/s^2=4kg*a
5m/s^2=a
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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: ->->->->->->->->->->->-> scussion:
Ideal acceleration, if 20N was only force: 20N=10kg*a
20kg*m/s^2=10kg*a
2m/s^2=ideal acceleration
Other force(s) must be acting in the direction opposite the motion of the object to cause the object to accelerate at a lower rate.
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What is the total of all those forces and in what direction does this total act?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
Fnet=20N+F
Fnet=m*a
Fnet=10kg*1.5m/s^2
Fnet=15kg*m/s^2
Fnet=15N
15N=20N+F
Other force(s) equal -5N, or 5 N in the direction opposite the motion of the object.
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5 minutes
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&#Very good responses. Let me know if you have questions. &#