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: ->->->->->->->->->->->-> :
F = m * a
F = 12kg * 3m/s^2
F = 36kg * 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: ->->->->->->->->->->->-> :
20 Newtons = 4kg * a
20 kg * m/s^2 / 4kg = 4kg / 4kg * 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: ->->->->->->->->->->->-> :
F = 10kg * 1.5m/s^2
F = 15 Newtons
It takes 15 Newtons of force for a 10kg object with an acceleration of 1.5m/s^2. If you exerted a force of 20 Newtons on the object, then there is another force working with yours.
• What is the total of all those forces and in what direction does this total act?
answer/question/discussion: ->->->->->->->->->->->-> :
Kinetic Energy in the positive direction
If positive work is done ON a system, the total kinetic energy of the system increases.
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20 min.
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&#Your work looks very good. Let me know if you have any questions. &#