Was the purpose of this lab accomplished? Why or why not? (Your answer to this question should show thoughtful analysis and careful, thorough thinking.) "Galileo had already made a significant beginning toward a knowledge of the law of motion. He discovered the law of inertia and the law of bodies falling freely in the gravitational field of the earth......" - Albert Einstein (1879-1955) At the outset of our study of motion, it is essential that we define and understand the parameters used to describe motion. Each of these parameters will consist of a magnitude (a number) and a unit (meters, seconds, ect.). Parameters without a direction are called scalars while measurements that also include direction, such north or up, are called vectors. Speed is a scalar. Example; 60 miles per hour. Velocity, on the other hand, is a vector due to the addition of direction. Example; 450 mile per hour northeast. Distance (d) is one parameter used to describe motion while time (t) is another. Distance is measured in meters or feet; time is measured in seconds, minutes, or hours. An object has to move some distance (Δd=d
2
​
−d
2
​
) over some time (Δt=t
2
​
−t
3
​
) to be in motion. The first distance measured d
1
​
and the second is d
2
​
, whereas t
1
​
is measured first and t
2
​
next. If an object moves over a great distance in a short time, we say that the object is moving with a high speed (v). Speed is measured in meter/seconds (m/s). The definition of speed is: v=d/t or v=(d
2
​
−d
1
​
)/(t
2
​
−t
1
​
) Speed, in the definition, is the average speed. The object can move faster or slower in the time measured, but its average speed is what is reported as speed, v, for that time period. The symbol, v, is used for speed. It is a scalar (as in 16 m/s ) so no direction need be reported. If the object's direction of travel is important, it becomes a vector. Then we use velocity (
v
) to describe its motion and include a term for direction (as in 16 m/s east). In this exercise, we will be recording an object's motion by measuring the time it takes to travel some measurable distance. This will allow us to calculate the object's speed. Further, if an object's speed is changing, it must be accelerating (a). In physics, acceleration can be positive (speeding up) or negative (slowing down). When an object is accelerating, its velocity is simply changing. How could this occur? Any object that is accelerating must have a net force acting on it; no net force, no acceleration. An object's acceleration is defined as: a=v/t or a=(v
2
​
−v
1
​
)/(t
2
​
−t
1
​
) (Eq.2) For this exercise we will be focusing on a cart that is (1) stationary, or not moving ( v is 0 m/s);(2)moving ( v is a constant); and (3) accelerating ( v is increasing or decreasing).

Yes, the purpose of the lab is accomplished because the experiment was focused on describing motion and defining parameters used to describe motion. This was accomplished through the use of distance and time to calculate speed.

the use of acceleration to determine whether an object is accelerating or not.The lab experiment allowed us to examine the parameters used to describe motion, which are distance and time. Using these parameters, we were able to calculate speed. The definition of speed is v=d/t or v=(d2-d1)/(t2-t1).

The object's average speed is the speed that is reported over a period of time. If an object's direction of travel is important, velocity is used to describe its motion and include a term for direction (as in 16 m/s east).The experiment also demonstrated that if an object's speed is changing, it must be accelerating. An object's acceleration is defined as a=v/t or a=(v2-v1)/(t2-t1).

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"The magnitude of the electrostatic force between two identical ions that are separated by a distance of 5.0 × 10–10 m is 3.7 × 10–9 N. (a) What is the charge of each ion? (b) How many electrons are "missing" from each ion (thus giving the ion its charge imbalance)?"

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Summarize the Hobbs discourse studies - defining the law
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