PHYS 111A-008
Lab 111: Projectile Motion
Objectives
Introduction and background
Part I
Part II.
If the coordinate axes are chosen such that the origin is at the initial location of the projectile and the +y direction points upward, the following expressions hold for the projectile with an angle relative to horizontal.
Experimental Setup
Mini Launcher attached onto a base (PASCO, ME-6825), Steel ball (16 mm diameter),Push-rod, C-Clamp, safety glass, Carbon and white papers in a file folder, Scotch tape (on the counter), Ring target with one hole, tripod with right angle clamp to hold the Ring target, Counter tray, Plumb bob, Bubble level.
Data Tables
Table I
Trial Number |
1 |
2 |
3 |
4 |
5 |
Average |
X |
1.47 |
1.47 |
1.47 |
1.48 |
1.485 |
1.475 |
Table III
Ꝋo=20°
Trial Number |
1 |
2 |
3 |
4 |
5 |
Average |
R |
.73 |
.73 |
.755 |
.735 |
.735 |
.733 |
Vo=3.342
Table IV
Calculated D[cm] |
Measured D[cm] |
%diff |
0.9268 |
.915 |
1.28% |
Discussion and Questions
Our prediction with the experimental result is very similar to the values observed. Using these formulas, we were able to predict where the ball would strike as well as to know where the target needed to be placed. The horizontal acceleration is always zero and when the ball was launched at an angle there was a horizontal component of the velocity.
Conclusions
In this lab, we got a better understanding of what projectile motion really is. Our predictions with the experimental result were similar to the values observed. While doing this lab we learned how to use these formulas correctly and through these formulas, we were able to confirm the expected values of displacement and height.
Follow Us