phy 201
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 = ma
F = 12kg * 3m/s^2
F = 36 kg/m/s^2 or 36N
What would be the acceleration of a 4 kg mass subject to a net force of 20 Newtons?
answer/question/discussion:
F = ma
A = m/F
You didn't solve correctly for a.
A = 4kg / 20kg /m/s^2
A Newton is a kg * m/s^2, not a kg / m / s^2. If you use the correct units, the units of this calculation won't work out.
A = .2m/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 = 20N
A = 10kg /20N
A = .5 m/s^2
A = 1.5 - .5 = 1 m/s^2 not accounted for
There must be additional forces because the acceleration would not be as great if it was only that single force.
F =ma
F = 10 * 1 m/s^2
F = 10N
What is the total of all those forces and in what direction does this total act?
answer/question/discussion:
Fnet = 20N + 10N = 30N
This direction acts in the direction of the force.
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12min
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You're on the right track, but you have some errors that need to be corrected.
&#At least part of your solution does not agree with the solution and comments given at the link below. You should view the solution at that link and self-critique as indicated there.
Solution
This link also expands on these topics and alerts you to many of the common errors made by students in the first part of this course. &#