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?
Fnet = ma
Fnet = 12 kg * 3 m/s^2 = 36 N
• What would be the acceleration of a 4 kg mass subject to a net force of 20 Newtons?
A = Fnet / m
A = 20N / 4 kg = 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?
By drawing a free body diagram we can see that there is a force being produced by gravity downward on the object (mg) and a force being applied upward on the object from the surface it is on (Fn). There is also a force produced in the opposite direction of the motion of the object.
• What is the total of all those forces and in what direction does this total act?
If we knew the angle at which the person is exerting a force on the object then we could determine the force of the person for the y-axis. From there we could determine the normal force being exerted on the box from the table. Since the person is pulling on the box we can assumed that the table does not push against the full with of the box because part of the pull exerted by the person is in the upward direction. The direction would be the way the person is pulling.
Good thinking about directions, etc., but the stated problem doesn' require that.
The acceleration of the object is 'in the direction of your force'. The conclusion is that there is a force of 5 N in the direction opposite your force.
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15 min
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&#Good responses. See my notes and let me know if you have questions. &#