- #1

mizz_melanie

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- Also the targets will be randomly placed the day i have to shoot it

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- Thread starter mizz_melanie
- Start date

In summary, the conversation discusses the task of building catapults in school and finding a way to accurately hit targets placed 2-4 meters away using mathematical formulas and possibly protectors or measuring length. The suggestion is made to use Google to find information on calculating the distance of a projectile, and three helpful links are provided. It is also suggested to experiment with different launch angles and stretch of the catapult to gather data and plot a graph. If familiar with standard equations, the distance can be calculated based on launch velocity and angle.

- #1

mizz_melanie

- 3

- 0

- Also the targets will be randomly placed the day i have to shoot it

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- #2

Bobbywhy

Gold Member

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- 52

Google is your friend. It can help you find information. Learn to use Google search and you will get new knowledge, satisfaction, and be happier. I entered the search words “calculate distance of projectile” and in 0.49 seconds about 1,140,000 results appeared. Below please find three that you may find useful:

How to Calculate the Distance of a Projectile

Read more:

http://www.ehow.com/how_6357145_calculate-distance-projectile.html#ixzz2HoYg1DQI

http://en.wikipedia.org/wiki/Trajectory_of_a_projectile

http://www.calctool.org/CALC/phys/Newtonian/projectile

Let us know how your project goes. (edit) If you have any doubts or further questions, post them here. Members here are always willing to assist any true searcher for the behaviours found in our natural world.

Cheers,

Bobbywhy

- #3

CWatters

Science Advisor

Homework Helper

Gold Member

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If not then this is probably an experimental exercise. Set up the catapult so it fires the projectile at a fixed angle (say 45 degrees). Then arrange so you can stretch the catapult a controlled amount. Fire off numerous shots with various amounts of initial stretch. Plot a graph for stretch vs distance. Try and get lots of data that covers the likely range (eg 2 - 4m). Then when the teacher tells you the target distance you can look up the stretch required. I suspect it won't be possible to get accurate results. Slight changes to the angle may make a big difference.

If you are familiar with the standard equations then the distance will depend on the initial launch velocity and launch angle. See links Bobbywhy posted. The launch velocity will depend on the properties of the elastic used in the catapult (Google Hookes law).

To accurately measure the distance an object travels, you can use a measuring tool such as a ruler, tape measure, or meter stick. Place the measuring tool next to the object's starting point and note the measurement. Then, after the object has traveled its desired distance, measure from its end point back to the starting point. The difference between the two measurements will give you the distance traveled.

The distance an object travels can be affected by various factors such as the initial velocity, air resistance, gravity, and surface friction. These factors can either increase or decrease the object's distance traveled depending on their magnitude and direction.

To control the distance an object travels, you can manipulate the initial velocity, angle of launch, and any external forces acting on the object. By adjusting these factors, you can alter the object's trajectory and ultimately change the distance it travels.

The shape of an object can greatly affect its distance traveled. Objects with a streamlined shape, such as an airplane or a bullet, can travel further due to their reduced air resistance. On the other hand, objects with irregular shapes or rough surfaces can experience more air resistance and therefore have a shorter distance traveled.

It is possible to make accurate predictions about the distance an object will travel, but it depends on the complexity of the scenario. In simple scenarios with minimal external factors, the distance can be predicted using mathematical equations such as the formula for projectile motion. However, in more complex scenarios, there may be too many variables to accurately predict the distance an object will travel.

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