Expert answer:PHY03 Velocity and Acceleration Lab Report

  

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Velocity and Acceleration
Name:
Group Members (if any):
Instructions:
Describing the motion of an object often refers to the object’s speed or velocity. Speed is the rate of change of the
object’s distance travelled compared to the time required to cover that distance. Velocity is similar to speed, but adds
direction of travel. An example of speed is 6.5 m/s while velocity would be 6.5 m/s east. Distance is found by taking th
difference in an object’s positions. To find the distance the object’s final position minus the object’s initial position giv
the distance travelled along with its direction. If the object changes its speed then it has acceleration. The object’s sp
increases if it undergoes acceleration in the same direction of travel of the object. The object’s speed decreases when
acceleration occurs in the opposite direction of travel of the object. When the velocity of the object stays the same for
times, then it is traveling with a constant velocity. Some conventional signs used for direction are positive to refer to t
right or up, while negative refers to the left or down. We will investigate these concepts using two different types of toy
Outcomes:
1. The student will describe the velocity of toy cars using a distance-time graph.
2. The student will calculate the velocity and describe the acceleration for each car.
3. The student will use graphing software to analyze the data.
Materials:
1
1
1
1
1
1
Battery Car
Pull Back Car
Tape Measure
Chalk
Stop Watch
Camera or phone to take a selfie with your setup.
A partner would be helpful for this lab
Safety Points:
1. Small parts are involved, keep them from small children or animals.
2. Don’t leave materials scattered on the floor, trip hazard.
Procedure:
1. Clear a large distance up to 5 meters on a smooth level sidewalk or floor; mark the starting line with your chalk.
2. Using the Battery car, turn it on then release it at the starting point. Use the timer to determine distance travelled in 1 second
distance the car has gone during each interval using your chalk.
3. Measure and record the distances in the data table below. Record all distances from the starting point of the car.
4. Repeat steps 2 and 3 three more times.
5. Using the Pull Back car, repeat steps 2 – 4. Be sure pull the car back the same distance every time: recommended distance is
6. Find the average distance for each time for each car. These are the values that you will be graphing.
7. You must also take a selfie of you with your setup to make the measurements. Your face must be visible in the picture. Inse
lab.
Data & Calculations:
Battery Car
Time (sec)
0
1
2
3
4
5
6
Trial 1 (m)
0
0.412
0.825
1.239
1.624
2.021
2.321
Trial 2 (m)
0
0.407
0.811
1.215
1.598
2.042
2.431
Trial 3 (m)
0
0.422
0.841
1.262
1.654
2.097
2.378
Trial 4 (m)
0
0.415
0.821
1.232
1.613
2.026
2.334
Average
Distance (m)
0
0.414
0.8245
1.237
1.62225
2.0465
2.366
Pull Back Car
Time (sec)
0
1
2
3
4
5
6
Trial 1 (m)
Trial 2 (m)
Trial 3 (m)
0
0
0.871
0.868
1.746
1.734
2.598
2.578
3.584
3.567
3.584
3.567
3.584
3.567
* note that the car may stop before 6 seconds.
Trial 4 (m)
Average
Distance (m)
0
0
0
0.819
0.898
0.864
1.718
1.765
1.74075
2.539
2.621
2.584
3.462
3.671
3.571
3.462
3.671
3.571
3.465
3.671
3.571
If that happens, just record the farthest distance it reached.
Analysis:
1. Make a distance vs time graph for each car on the same axis using the average values (time on the x-axis, distance on the y-
2. Describe the motion of each car. How were the motions similar? Different?
3. The slope of a distance-time graph represents the average velocity. Use the equation for slope to complete the table below fo
slope formula:
Battery Car
Pull Back Car
Average
Average
Time Interval (s)
Time Interval (s)
Velocity (m/s)
Velocity (m/s)
0-2
0-2
2-4
2-4
4-6
4-6
4. How did the velocity of the Pull Back car change when compared to the Battery car?
5. Create a velocity-time graph for each car on the same axis, using the data tables in #3 above. Find the best-fit line or curve fo
6. The slope of a velocity-time graph represents the acceleration. Calculate the acceleration between velocity points using the sl
7. Give (2) problems you encountered while performing this lab. What would you do differently the next time?
8. Add your selfie below.
the rate of change of the
is similar to speed, but adds the
Distance is found by taking the
he object’s initial position gives
acceleration. The object’s speed
ject’s speed decreases when the
he object stays the same for all
ction are positive to refer to the
sing two different types of toy
e with your chalk.
distance travelled in 1 second intervals. Mark the
ng point of the car.
time: recommended distance is 30 cm.
phing.
st be visible in the picture. Insert it at the end of the
Sample average
calculation
(Trial1+Trial2+Trial3+Trial4)/4=Averge distance
farthest distance it reached.
on the x-axis, distance on the y-axis). This will be a
e to complete the table below for each car. The
y2-y1/x2-x1
Sample average
calculation
Find the best-fit line or curve for each toy car. Include
ween velocity points using the slope formula. The
e next time?

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