# PHYSICS 112 San Francisco State University Lab 2 Motion in 1D Worksheet

User Generated

Zvxrufl

Science

physics 112

San Francisco State University

PHYSICS

## Description

I need some help with PHYS 0112-01 General Physics I Motiopn in 1D. Please submit your answers as a PDF.

### Unformatted Attachment Preview

Purchase answer to see full attachment
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.

## Explanation & Answer

Lab 2: Descriptions of Motion

SUMMARY

Physics 112
Lab Partners’ Names:
Be sure to use your notes and responses from the lab you conducted to answer this problem. Check that your answers on
are consistent with what you have learned in the lab.

1. A biologist is investigating the behavior of ants. The graph below shows the position of an ant as a function of
time as the ant moves along a celery stalk. To describe the ant’s motion, a coordinate system is chosen such
that x = 0 at the center of the stalk and positive values of x indicate positions on the leafy end of the stalk.

(a) At what time or times, if any, is the ant at rest? Explain.

The time at rest based on the above graph is seen to be: 2.5 seconds to 5.5 seconds

(b) At what time or times, if any, is the ant moving toward the leafy end of the celery stalk? Explain.

Since he moves towards the leafy stalk (positive end) when its path curve is moving upward. For this case,
biologist was moving to the leafy end at t= 5.5 s to 8 s.
(c) At what time or times, if any, does the ant change direction? Explain.

These are the points that are either PEAKS or TROUGHS. So it did change direction at t= 2.5 s and t=5.5 s
(d) At what time is the ant furthest from where it was at t = 0? Explain.

He is moving at a constant speed if it follows a fixed slope curve which should be any straight line. For this
case, he moves at a constant speed at t= 0 s to t=5.5 s.

(e) During what time intervals, if any, is the ant moving with approximately constant speed? Explain.

He will be moving fastest at the part of the curve with the highest absolute value of the slope or the one with
a slope (or tangent) which is almost a straight vertical line. For the curve of he's position, it must be moving
at its fastest at t=6 s to t = 8 s

© 2021 San Francisco State University

Lab 2: Descriptions of Motion

SUMMARY

Physics 112

(f)

At what time is the ant moving fastest? Explain.

He will have the same velocity if the slopes of their position curves are parallel. For their case he has same velocity
at t=4.5s to 5.5 s.

(Look at your lab notes while doing
this!)
1. Write down one major conclusion you can draw from this week’s laboratory. Please explain in
detail.

I learned that in one dimensional motion object motion is only in x direction but in 2dimension
motion object velocity both x direction ( horizontal ) and y direction ( vertical motion) .
2. Describe the experimental evidence that supports your conclusion. Please explain in detail.

The resultant motion is in between x and y axis, any object thrown with certain initial velocity
making some angle other than 90 with the horizontal and allowed to move under force of gravity
only is called projectile motion. Its vertical (final) velocity becomes zero; this reason gives the
object reach maximum height. But it has horizontal velocity so it not dropped at that it is moving
horizontal direction.
3. Give one example of applications/situations for the finding(s) you described above in your
(everyday) life outside of physics lab, and explain the connection.
Time of flight is just double the maximum height time.
It depends upon,
i) Speed at start -the faster, the further
ii) Elevation angle-45 degrees elevation angle gives the maximum height
iii) Wind velocity-If the wind is in the opposite direction of the motion of the projectile, the time
of flight decreases and if the wind is in the same direction as that of the projectile, the time of
flight increases.

© 2021 San Francisco State University

Ignore the word file, use only the two pdfs

Lab 2: Descriptions of Motion

SUMMARY

Physics 112
Lab Partners’ Names:
Be sure to use your notes and responses from the lab you conducted to answer this problem. Check that your answers on
are consistent with what you have learned in the lab.

1. A biologist is investigating the behavior of ants. The graph below shows the position of an ant as a function of
time as the ant moves along a celery stalk. To describe the ant’s motion, a coordinate system is chosen such
that x = 0 at the center of the stalk and positive values of x indicate positions on the leafy end of the stalk.

(a) At what time or times, if any, is the ant at rest? Explain.

The time at rest based on the above graph is seen to be: 2.5 seconds to 5.5 seconds

(b) At what time or times, if any, is the ant moving toward the leafy end of the celery stalk? Explain.

Since he moves towards the leafy stalk (positive end) when its ...

### Review

Anonymous
I was struggling with this subject, and this helped me a ton!

Studypool
4.7
Indeed
4.5
Sitejabber
4.4