Hi, I would like to ask about some questions relating to projectile motion. There are not necessarily many calculations involved. Anway, I am supposed to make a lab report concerning a projectile motion project. The project I did was launching tennis balls across the court using a lobster (machine that launches tennis balls like in movies). I alter the angles (independent variable) and see the displacement of the ball (dependent variable). I took 7 readings, 5 trials each.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

So my question is: what is the linear relationship between angle and distance? In my reports I am supposed to make a graph out of the data I obtained, and linearize the data I get and obtain an equation for that linear graph. The data I obtained, however is none like I've faced before. The data I got gives me a parabole-type of curve. I don't even know how to draw a line along the curve using Microsoft Excel for this kind of graph. I guess this is due to the fact that if you increase the angle, eventually the ball's displacement decreases.

Here's the data I obtained:

Angle (degrees) Average Displacement (m)

20.11 15.72

24.3 18.84

28.98 20.4

38.29 21.68

49.67 18.9

61.53 18.44

74.6 10.18

So how do I linearize the data? What is the relationship between the angle and displacement of a projected object?

Thanks and sorry if I post in the wrong section of the forum, I am new to the forum :)

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# Homework Help: Projectile motion graph problems

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