7/30/2019 Velocity Experiment

1/3

Velocity Experiment PLANNING-

Question: How does the change in distance effect the time?

Aim/Objective:

After finding out how the distance effects time, we take the time and distance and calculate thespeed. V (velocity) = D (distance) divided by the T (time). We will find out the velocity from thegradient of the distance-time graph.

Equipment:

1. Glider.2. Track.3. Measuring tape.4. Air blower.5. Light gate.6. Timer.

Diagram:

7/30/2019 Velocity Experiment

2/3

Procedure:

1. We will first gather all the needed materials.2. Then, we will connect the air blower pipe to the track.3. After this, we will put the measuring tape at the bottom of the track to measure our distance.

4. We will then place Light Gate 1 at 40 cm and Light Gate 2 at 100 cm. This will leave a 60cm gap between the two gates.

5. Now we will attach the timer, one wire at Light Gate 1 (40cm) and one wire at Light Gate 2(100 cm) and select the option on the timer of Time taken between travelling through PointA to Point B

6. We will then place the glider at the beginning of the track.7. We will now start the actual experiment. We will push the button of the air blower and

watch the glider move through the track past Light Gate 1 and Light Gate 2.8. The timer will show us the time it took to go past the two light gates and so we will write

down the result.9. We will keep moving Light Gate 2 10 cm further away from the initial distance between the

two Light Gates. This means that the distance between Light Gate 1 and Light Gate 2 willincrease by 10. First 60 cm, then 70 cm, then 80 cm and so on.

10. We will keep on placing the glider back to the beginning of the track so the air blower can blow the glider through the track. We are using the same glider and the same pressure of air blowing through the track and so these are our control variables .

11. We will repeat what we did for the distance of 60 cm for 70 cm, 80 cm, 90 cm, 100 cm, and110 cm. The Distance is our independant variable as this is what were keeping the same.

12. We will repeat the procedure for each distance 2 more times for reliability and note down

the time taken by the glider to cover the distance each time, as T1, T2, and T3. The Timesare our dependant variable as this is what were measuring. 13. We will take the average between the 3 time results of each distance and call it our

Average Time.

EVIDENCE:

Table:

Distance in cm T1 in Sec T2 in Sec T3 in Sec Average Time60 1.16 1.16 1.17 1.16

70 1.33 1.33 1.33 1.3380 1.49 1.47 1.47 1.4890 1.59 1.59 1.58 1.57100 1.74 1.77 1.74 1.75110 1.87 1.86 1.87 1.87

7/30/2019 Velocity Experiment

3/3

ANALYSIS:

Graph:

EVALUATION

Reliability:

For reliability, we will repeat the experiment 3 times in total for each distance and note down thedifferent times and calculate the Average Time. This will make sure that our results are correct andmore accurate than if we did the experiment only once.

Improvement:

The experiment was done in the best possible manner because we used an electronic timer.

Precaution:

Because we didnt deal with anything hazardous, there was no precaution needed.