INTERNATIONAL ANTALYA UNIVERSITY COLLAGE OF ENGINEERING

PHYSICS 101 LABORATORY REPORT
NUMBER OF LAB SESSION: 2

EXPERIMENTS: 1- The Relationship between Time of Flight and Initial Velocity 2- Projectile Motion 3- Projectile Range versus Angle

AUTHOR OF THIS REPORTS: FULL NAME: RANA AKMAN STUDENT NO: 140201038 LAB SECTION:

OTHER EXPERIMENTER: FULL NAME: EDA HAZAL RAŞİT STUDENT NO: 140203009

EXPERIMENT PERFORMED ON: 30/09/2015 REPORT SUBMITTED ON: 07/10/2015

EXPERIMENT 1: The Relationship between Time of Flight and Initial Velocity
Equipments:
1. Projectile launcher 2. Time-of-Flight Accessory 3. Xplorer GLX (as timing device) 4. Yellow Nylon Ball (2.5 cm diameter, 10 g) 5. Photogate 6. Photogate bracket 7. Carbon paper 8. White paper 9. Measuring tape 10. Duct tape
Purpose:
Purpose of this experiment is to
Procedure:
I have equipment to measured the fall time and I have different ball. This lesson was my first LAB so I didn’t know anything about equipments and teacher have thought equipments. After that, we make a group and we have started. We started the experiment by connecting material such as control box, drop box and AC adapter. After, I set the h=1,50. This distance between the bottom of the ball and the time of flight accessory. It is very important because if we didn’t calculate truely, we could find wrong results again. However, we tried 3 times and we did not mistake.
Results:
I measured three times for each different balls except practise golf ball.After that I calculated average time for each balls.The following table shows us fall time results.

| Yellow Nylon Ball | Regular Golf Ball | Practise Golf Ball | Large Hollow Plastic Ball | t1 | 0,556256 | 0,559450 | 0,588173 | 0,567162 | t2 | 0,555550 | 0,559600 | 0,565848 | 0,567878 | t3 | 0,609670 | 0,559279 | 0,565334 | 0,568190 | tave | 0,57382533 | 0,559443 | 0,57311833 | 0,56774333 |

Questions: 1.1 Calculate the percent error between Predicted time of flight t and measured time of flight tav for both ranges. Explain the probable causes of the error? 1.2 Compare the average flight times for Short range and Medium range; is there a difference between these two? Is that normal? 1.3 What would you expect to see if the ball was launched with long range setting?

Conclusion:
I have learned different objects of various sizes, when they fall, they fall different times each other because of frictional force. After this experiment , we can see same objects fall different times each other.

EXPERIMENT 2: Projectile Motion
Purpose:
Purpose of this experiment is
Procedure:
Some same equipments were used again in this experiment except practise golf ball, regular golf ball and large hollow plastic ball. Just yellow Nylon ball was used because we had to measure different height with same ball in three times. Before we start, we combained equipments with cables. Again we set heightes and try three times all of heightes. If we didn’t set truely, we couldn’t find true results. Firstly, I hang the ball on drop box. Than I press the time switch button and it sent command to drop box for free falling down. When the ball touch ground Xplorer GLX measured fall time of ball. After that, we wrote what did we find and we calculated averages.
Results:

Questions: 1.1. Calculate the percent error between predicted range

Conclusion:

EXPERIMENT 3: Projectile Range versus Angle
Purpose:
Purpose of this experiment is
Procedure:

Angle | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | Range, x (m) | 2,83 | 3,23 | 3,40 | 3,36 | 3,08 | 2,62 | 1,82 | 90 |

Questions: 1. For Table 4, plot the range versus the angle and draw a smooth curve througt the points. Use x axis as angle and y axis as range