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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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