Motion to determine property of the

September 26, Navy photo by Ensign John Gay Isaac Newton's First Law of Motion states, "A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force.

Motion to determine property of the

Motion of a Mass on a Spring A simple pendulum consists of a relatively massive object hung by a string from a fixed support. It typically hangs vertically in its equilibrium position. The massive object is affectionately referred to as the pendulum bob. When the bob is displaced from equilibrium and then released, it begins its back and forth vibration about its fixed equilibrium position.

The motion is regular and repeating, an example of periodic motion. Pendulum motion was introduced earlier in this lesson as we made an attempt to understand the nature of vibrating objects.

Pendulum motion was discussed again as we looked at the mathematical properties of objects that are in periodic motion. Here we will investigate pendulum motion in even greater detail as we focus upon how a variety of quantities change over the course of time.

Such quantities will include forces, position, velocity and energy - both kinetic and potential energy. Force Analysis of a Pendulum Earlier in this lesson we learned that an object that is vibrating is acted upon by a restoring force. The restoring force causes the vibrating object to slow down as it moves away from the equilibrium position and to speed up as it approaches the equilibrium position.

It is this restoring force that is responsible for the vibration. So what forces act upon a pendulum bob?

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And what is the restoring force for a pendulum? There are two dominant forces acting upon a pendulum bob at all times during the course of its motion. There is the force of gravity that acts downward upon the bob.

And there is a tension force acting upward and towards the pivot point of the pendulum. The tension force results from the string pulling upon the bob of the pendulum.

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In our discussion, we will ignore the influence of air resistance - a third force that always opposes the motion of the bob as it swings to and fro. The air resistance force is relatively weak compared to the two dominant forces.

The tension force is considerably less predictable. Both its direction and its magnitude change as the bob swings to and fro. The direction of the tension force is always towards the pivot point.

So as the bob swings to the left of its equilibrium position, the tension force is at an angle - directed upwards and to the right.

And as the bob swings to the right of its equilibrium position, the tension is directed upwards and to the left. In physical situations in which the forces acting on an object are not in the same, opposite or perpendicular directions, it is customary to resolve one or more of the forces into components.The motion of an extraordinarily jubilant bird flying straight up and down is given by the graph below, which shows the vertical position y y y y as a function of time t t t t.

Answer the following questions about the motion of the bird. A light source that gives off white light is therefore emitting multiple waves of light with a wide range of wavelengths from nanometers through nanometers.

Motion to determine property of the

All of these light waves move at the same speed (the speed of light), so you can determine their frequencies and see that red light has a lower frequency than blue light. Biomechanics of Skeletal Muscle 4 CHAPTER ture and mechanical properties of the tendon, composed of connective tissue, are presented in Chapter 6.

The muscle the joint motion that results from a muscle contraction. The fundamental behavior of muscle is shortening, and it is this. C. Michael Smith and Suzanne Paul, Attorneys for the Debtor, Mobile, Alabama This case is before the Court on the Trustee’s motion to determine the estate’s interest in certain property.

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