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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 = 12 kg/3m/s^2
F = 4 Newtons
• What would be the acceleration of a 4 kg mass subject to a net force of 20 Newtons?
answer/question/discussion:
F = m/a
Fa = m
a = m/F
a = 4 kg/20 Newtons
a = .2 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:
We know there are other forces because the equation below does not balance:
20 Newtons = 10 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:
F = 10 kg/1.5 m/s^2
F = 6.667
The total of the forces is 6.667 Newtons, and they act in the direction of the motion of the object.
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6 minutes
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&#Good responses. Let me know if you have questions. &#