In this experiment, we investigated how different materials and the angle of inclination affect static and kinetic friction. Our objective was to measure frictional forces and determine friction coefficients between surfaces. We aimed to understand how the angle of the inclined plane influences the normal force and friction, connecting our findings to real-world applications in transportation and construction. Before starting, our instructor, Ms. Atbany, explained the procedures for accurate results and emphasized the importance of using high-quality materials for reliable data and to measure the mass on the random object we choose for this experiment. During the first phase, we attached a string to the objects (Key chains accessory, and a mouse) to pull them along a surface and record measurements. However, we ran out of time and could not measure the kinetic friction. In the second phase, we set up an inclined plane, gradually lifting one end until the object slides down. We timed their descent, noting the height of the ramp and the time taken to reach the end. This hands-on experience aimed to test our hypotheses about static and kinetic friction and reinforce our understanding of related concepts. In hindsight, we recognized the need to minimize measurement errors related to distance for future experiments. Overall, I was satisfied with my performance, as I received a good grade and learned where to focus my efforts for future lab reports and assignments.

In our physics class, we recently had a test covering Statics and Dynamics. Statistics deals with forces on objects at rest or moving at a constant velocity, while Dynamics focuses on the forces that cause changes in motion, leading to acceleration. Unfortunately, my performance on the test was not great, primarily due to my lack of commitment to the preparation activities. I struggled particularly with recalling the necessary formulas, ultimately contributing to my poor results. However, I've realized that consistency in my studies can help me improve my memory of essential formulas in the future.

(front Side of the assignment)

On Question 2, we needed to write an equation for the velocity in the x-direction. I used the formula ( Vx = vcos(78) ) to calculate the velocity in the x-direction, which resulted in 

( Vx = 15.5{m/s}cos(78°) = 3.22 {m/s}

Moving to Part 3, Question 1, I found the velocity in the y-direction using the equation (Vy = v \sin(78°) ). This gave me ( Vy = 15.5{m/s}sin(78°)= 15.16{m/s} ).

Next for Part 3 Question 2, we were required to find the total energy of the bar in both the horizontal and vertical directions using the kinetic energy formula ( Ek = ½ mv² ) (where (m) is mass and (v) is velocity). 

- The total kinetic energy of the bar was calculated as:

  Ek(final) = ½ 5.8kg (15.5m/s)^2 = 696.725 J

- The kinetic energy in the x-direction (horizontal) was:

  Ekx = ½ 5.8kg (3.22m/s)^2= 30.068J

- The kinetic energy in the y-direction (vertical) was:

  Eky = ½ 5.8kg (15.16m/s)^2= 666.494J

In Part 3, Question 3, we had to find the maximum height the bar reached using the formula (-vi^2/2g}=Δr):

-(15.5m/s)^2/2 (-9.81m/s²)= 12.24m

Finally, we were asked how far away from the launch site the bar would land, assuming It was in the air for 3.12 seconds. We used the formula (Δrx = Vix\Δt):

Δrx = 3.33 m/s(3.12s)= 10.39m

Overall I did well on this assignment despite a few mistakes but I am mostly glad that I was able to get a pretty good grade and that all.

backside of the assignment