Mechanics assignment friction

This lab was based on dynamic effort and it was to turn off the speculation that was covered in lecture 5 to be correct. When relations with rocket relocation, it is the possibleness that when an object has been fired from its first point into the air, it allow come below the influence of somberness and is attracted to state with an speedup of g m/s squ ar.In the lab a arugula launcher was used to project two steel eye formals, angiotensin-converting enzyme in the crosswise direction and one in the just direction. The cluster that was launched in the vertical direction was junky 1 and the clunk that was launched in the swimming direction was b all in all 2. The purpose of this experiment was to investigate projectile doing through the use of a vertical quickening apparatus which shows the liberty of vertical acceleration from the horizontal amphetamine.Projectile motion is a form of motion in which an object or furcateicle (called a projectile) s thrown and twisted obliquely near the earths surface, and it moves along a curved path infra the action of solemness only. The path followed by a projectile motion called its trajectory. Projectile motion only occurs when in that location is one ability utilize at the beginning of the trajectory, after which on that point is no force in operation apart from gravity. Introduction Part B Part B of the lab was on Tractive Forces. Tractive force means the force available at the contact between the drive wheel tyres and driveway is fuckn as tractive effort or tractive force.As used in mechanical engineering the term tractive force can some(prenominal) efer to the total traction a vehicle exerts on a surface, or the amount of the total traction that is parallel to the direction of motion. The published tractive force valuate for some(prenominal) vehicle may be supposedthat is, calculated from known or implied mechanical propertiesor obtained via testing on a lower floor controlled conditions. The example that was taken in the lab was of a necessitate of 3 parts that were coupled together by couples (T 1) and (T2).The purpose of this lab was to prove the theory covered in lecture 6 was correct and to verify the relationship between force, down and cceleration in tractive forces which comes from Newtons 2nd law. We know that force = mass x acceleration and we also were giving the conditions to which the train was under. Table 1, Part A recorded and calculated data heedful eon and surpass for the vertical ball and the horizontal ball communicate from projectile launcher. Test 1st Ball (vertical) 2nd Ball (horizontal) surmount (s) (m) Time of escape (t) 0. 5 0. 93 0. 6 1. 38 0. 4 0. 51 1. 46 0. 43 0. 56 1. 36 0. 35 0. 57 1. 34 0. 60 0. 68 1. 39 0. 0 7 0. 40 0. 54 1 . 45 8 0. 28 1 . 31 9 0. 30 0. 47 10 1. 32 Average regard as 0. 391 1 . 387 Table 2, part A Calculated Horizontal velocity, acceleration collect to gravity, the % difference in the value of gravity, and the straight velocity. Horizontal velocity (Vh) (calculated) 2. 57 rrvs Acceleration due to gravity, g (calculated) 6. 38 m/s squared % difference in the value of g -34. 96% Vertical striking velocity (W) (calculated) 3. 83 rms (Horizontal velocity) S = Vx T therefore S = 1. 39 = 2. 57 m/s T 0. 54 (Acceleration due to gravity) Sv = IJvT 1 g(t)squared 2 Therefore = 2 (0. 93) squared T squared 0. 54 squared = 1. 86 = 6. 378 = 6. 8 rms 0. 2916 0. 2916 (% difference in the value of g) % difference = Calculated -g x one hundred . 81 (Vertical striking velocity) V=U+GXT v = o + 3. 83571 v = 3. 83 rms Discussion part A =6. 38-9. 81 x 100 In this lab that was realised it was shown that the theory behind projectile motion is correct. It was proven that both balls came under the influence of gravity once they left the projectile launcher and that they were both attracted to landed estate. The two balls were launched from the equal vertical height that the ball progeny 2 t hat was travelling in the horizontal direction traveled a nurture distance than ball mo 1 in the vertical direction.Even though ball number 2 travelled a further distance the wo balls will hit the ground at the kindred quantify as they both come under the same force of gravity however this was non shown in our table 1 (Fig 1) because their was kind-hearted errors such as, two people starting the stop watches at different times, the psyche pressing the trigger mechanism was releasing the balls faster sometimes than another(prenominal) times even though we would start the stop watches on the ascertain of 3. The other factors that had to be taken into consideration is, if the projectile launcher was at any sort of an angle due to the work bench not been balanced or level or an even surface.However the readings that were taken were unruffled very close to each other so experiment the sign velocity of each ball was O m/s. To calculate the acceleration due to gravity we manip ulated the equation to find (g) gravity. When dealing with projectiles, we use the same equations as linear motion but the (a) for acceleration is replaced or substituted with (g) for gravity. The acceleration due to gravity was 6. 38 m/s squared. In theory this acceleration should have been 9. 81 m/ s squared but due to the human errors that occurred during the experiments there was a difference of -3. m/s squared these % errors came from miscalculating of the time taken for the balls to hit the ground and the distance travelled by the horizontal ball. When the steel ball number 2 is project from the projectile launcher in the horizontal direction, the time it takes for the steel ball to hit the ground is independent of its initial horizontal velocity, the steel ball will continue to move in the horizontal direction with the same horizontal velocity in which it was projected from the projectile launcher with because there is no acceleration so it stays at a uniform velocity.The di stance that the steel ball number 2 travels in the horizontal distance before it hits the ground is dependent on the time of flight and the horizontal velocity that it was projected with. Projectile motion only occurs when there is one force applied at the beginning of the trajectory, after which there is no force in operation apart from gravity, this was proven in the experiment as ball number 1 was let beam from a height with no other force applied and ball number two was projected with a horizontal velocity from the projectile launcher and both balls were attracted to ground as they came under the nfluence of gravity.We found the value of acceleration using the average vertical height in which the ball was projected from and used the average horizontal time in which it took ball number two to hit the ground as ball number two was projected with an horizontal velocity it still should hit the ground at the same time as ball number one does as there both under the same force of gra vity. If our measurements and calculations were 100% we should have got an acceleration of 9. 81 m/s squared. The horizontal lot of the velocity of the object remains unchanged throughout the motion.The vertical contribution of the velocity increases linearly, because the acceleration due to gravity is constant. It is important to note that the part and the Maximum height of the Projectile do not depend upon mass of the projected body. The Range and Max Height are equal for all those bodies which are thrown by same velocity and direction. Air granting immunity does not make a motion displacement of a projectile this is why we do not take the mass of the balls into consideration or the mass of any objects when dealing with projectiles. This experiment proves and supports the theory behind projectile motion to be correct.We do not take the mass of the balls or bodies into consideration when dealing with projectile motion as the air resistance does not affect the displacement of t he projectile. The range and height are equal for all bodies which are thrown by the same velocity and direction. There was a minor difference in calculating the acceleration due to gravity, this was because of the different readings and human errors that took place during the experiment. Both balls come under the influence of the same gravity and are attracted to ground and should hit the ground at the same time.In theory both balls should hit the ground at the same time, but because there were two people using stopwatches to record the times taking there was going to be a difference in the readings and calculation. The horizontal distance ball number two travels before it hits the ground is dependent of the time of flight and the horizontal velocity of projection. Ball number two will travel at the same horizontal velocity because there is no acceleration or any other force applied. The vertical region of the velocity will increases linearly because the acceleration due to gravi ty is onstant, so it picks up speed as it is falling from a height.