A glider of length L moves through a stationary photogate on an air track. a pho
ID: 1917140 • Letter: A
Question
A glider of length L moves through a stationary photogate on an air track. a photogate is a device that measures the time interval (delta td) during which the glider blocks a beam of infrared light passing across the photogate. The ration Vd=L/delta td is the average velocity of the glider over this part of its motion. Suppose the glider moves with constant acceleration. (a) argue for or against the idea that Vd is equal to the instantaneous velocity of the glider when it is halfway through the photo gate in space. (b) Argue for or against the idea that Vd is equal to the instantaneous velocity of the glider when it is halfway through the photogate in time.Explanation / Answer
Time is because things happen ... time is the stuff that is made by clocks: you measure it with a standard clock like a stopwatch.
Space is because things have to have someplace to happen in. The amount of space is called the volume. You measure it with a ruler.
The other important aspect of the universe is matter - matter is the stuff that has inertia - the amount of inertia is called the mass. You measure mass with a balance.
All the question is saying is that the glider changes position.
The instantaneous velocity (the velocity of an object at a certain time) at the half point between the two laser points is equal to the average velocity of the entire flight. This is because the glider, which has a length of l, has a velocity that decreases linearly.
How's that?
No - I mean, how would you relate the concept of "instantaneous velocity" to an object normally?
But I think your answer is reasonable for all that.
please go through this for furthur information
https://wiki.brown.edu/confluence/.../Photogate%20Timers.pdf
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