Research Question To calculate the maximum height reached by an object fired vertically, and to compare with the experiment.

Authors Avatar by kukkungen (student)

Eline Hasselgård Størdal, 2STUZ        PHYSICS REPORT        17.11.12

PROJECTILE WITH VERTICAL INITIAL VELOCITY

DESIGN

Research Question

To calculate the maximum height reached by an object fired vertically, and to compare with the experiment.

Variables

Independent variables: - Launch level chosen.

Dependent variables: - Height reached by the plastic ball and velocity.

Controlled variables: - Projectile launcher, mass of plastic ball (same apparatus used in all trials).

Procedure

Apparatus:

Projectile launcher

Photo gates ±0.25ms-1

2.5cm plastic ball

Ruler ±1cm

Stand with attached ruler

Computer with DataStudio

  • Set up apparatus.
  • Do 5 trials on each launch level (3 levels) and measure initial velocity using DataStudio. Make sure that the projectile launcher is vertical.
  • Measure the vertical height from the photo gates.
  • Find the mean initial velocity.
  • Calculate and compare height with the experiment.
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DATA COLLECTION AND PROCESSING

Data Collection

Processing

* Heights written in red are heights from calculations.

½ m v2 = m g h

½ m v2 = m g h

½ v2 = g h

Level 1

½ (3.0822) = 9.81 h

4.749362 / 9.81 = 9.81 h / 9.81

h = 4.749362 / 9.81

h = 0.4841

h ≈ 0.48m

Level 2

Same calculation as above.

h = 1.2058

h ≈ 1.21m 

Level 3

Same calculation as above.

h = 2.2310

h ≈ 2.23m

Uncertainties: 

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