How would a segment of a waxed tape look if it had been marked by an object movi
ID: 1546502 • Letter: H
Question
How would a segment of a waxed tape look if it had been marked by an object moving with constant speed, instead of the constant acceleration of this experiment? If by some suitable mechanism the falling body had been given an initial downward push instead of being released from rest, would the resulting observed value of g have been different? Explain. Sketch a graph of velocity vs. time as it would look if the falling body were so light and of such a shape and size that the effects of air friction could not be neglected.Explanation / Answer
1.The passage of the falling object through the waxed tape leaves a small mark or spot on the tape, marking the position of the falling object.
2. A easier way to describe the motion of an object is with the relationship
Vavg = s / t
where s is the distance traveled in time t and vavg is the average velocity for the time interval t.
If the object accelerates uniformly as a result of the application of a constant force such as gravity, the acceleration is found as the rate of change of the velocities over successive intervals of time.
If equal time intervals t are used then the acceleration can be expressed as
A = v2 - v1 / t
where v2 and v1 are the average velocities over any two successive time intervals t.
In this experiment the acceleration of gravity, g, will be determined directly from the motion of a freely falling object using above equations.
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