Newtons 1st law of motion assignment

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Carteret Community College *

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PHY 110

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Mechanical_engineering

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Jun 24, 2024

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docx

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6

Uploaded by LieutenantPowerWombat24

1 15 N 15 N 15 N 35 N 8 N 2 N 6 N 8 N Newton’s First Law of Motion Name - Joshua Daniel Hall_________________________ Purpose: To become familiar with the forces acting on an object at rest Part 1: Net Force Model : Read the following carefully and study the diagrams that follow. Recall that a force is simply a push or a pull on an object. A force has both magnitude and direction . It has magnitude because you can push or pull with different amounts of effort. It has direction because you can direct a push or pull in a particular direction. The magnitude of a force is commonly measured in pounds (lb.) or Newtons (N). The greater the number of Newtons of force, the greater the magnitude of the push or pull. So a push with 5 N of force is a harder push than one with only 1 N. The net force is the total force on the object, taking into account the magnitude and direction of each individual push or pull. The following diagrams show the magnitude and direction of several forces acting on some boxes and the resulting net force on each one. 10 N net force = 10 N to the right net force = 0 N 15 N 10 N net force = 5 N to the left Critical Thinking Questions, Part I 1. Determine the net force (magnitude and direction) on the following objects. Net force = 20 N to the right 2 N 9 N Net force = 7 N to the right Net force of 4 newtons to the right
2 2 N 9 N 5 N Net force of 2 newtons to the right. Part II: Newton’s First Law of Motion states the following: An object maintains its state of motion unless it is acted upon by net force. This means that an object at rest will stay at rest unless the net force acting upon is non-zero. Critical Thinking Part II 2. Suppose each of the boxes in Question 1 are initially at rest. Which ones will remain at rest? None will remain at rest because you have to have a net force of 0 to remain at rest, and none of those boxes have a net force of zero applied to them.
20 N 3 3. Each of the following boxes is initially at rest. Show the magnitude and direction of the force needed for the box to remain at rest. a. 20 Newtons to the left 2 N 9 N b. 7 Newtons to the left c. 13 Newtons upward 6 N 6 N 13 N d. Hint: You need two forces for this one! 7 N 13 N 7 Newtons to the right and 13 Newtons Upwards e. In each of the above examples with the missing force drawn in, what is the net force on each box? The net force = 0
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