Part Two: This part of the lab was to hit Mr. Bill with the projectile as he was sitting on the floor. First, the distance between the projectile launcher and Mr. Bill (3.5m) was given by Mr. Neenan. Next, the given velocity from part one (6.27 m/s) was used to solve for the angle needed to hit Mr. Bill. Once the angle was found, the projectile launcher was placed on the ground 3.5m away from Mr. Bill and the projectile was fired. Part Three: This part of the lab was to hit Mr. Bill with the projectile while he was elevated off the ground.
Description: In these series of experiments the apparatus we used was a spring gun that for the first experiment shot a steel ball freely which eventually struck the floor. For the second and third experiments the gun fired the steel ball into a pendulum. To measure the velocity of the steel ball, when it was launched freely, carbon paper and a 2-meter ruler were used to determine the distance it travelled and then kinematics were used to calculate the balls initial velocity. When the steel ball was launched into the pendulum the laws of conservation of energy and momentum were utilized to determine the balls initial velocity. Theory: 3 Kinematic Measurement of Speed In this experiment the steel ball was moving in two dimensions both horizontally and vertically.
Megan Lankford 10/11/12 Physics Lab: The Ballistics Pendulum and Projectile Motion Introduction/Objective In this lab, our focus was to identify the initial velocity of a metal ball by firing it as a projectile and compare it with the velocity. Also, we had to determine the initial velocity of the ball fired into the ballistics pendulum and its relativity to the initial velocity in which the ball plus pendulum moves after firing. This lab demonstrates the principle of conservation of momentum and projectile motion and how they are relative to each other. Procedure 1 To being our experiment, we had to weigh the metal ball and pendulum to give us our mass and help us determine the before and after effects of the collision. After we had taken all of our measurements we had to decide which setting we were going to fire the ball at.
However, if an object were shot out of a gun for example , in a horizontal direction , then the force of gravity would directly act upon the object on its descent . When an object is projected at a specific angle, then your v is no longer v. In other words your final velocity is not equal to your initial velocity . The equation v=v cos is used. Experiment overview: In this lab , my partner and I performed multiple attempts to calculate the average distance a projectile would travel before hitting the ground when shot out of a gun in a horizontal direction . In the first trial , we shot the circular metal ball out of the gun at an angle parallel to the ground(0).The gun , itself , had three levels of compression .
Two lab studies both using independent measures design were carried out. The independent variable in both of the experiments was the verb used in the sentence. The dependant variable in experiment 1 was the PP’s speed estimate, whereas in experiment 2, the dependant variable was whether or not the PP’s believed they saw glass. The PP’s for experiment 1 were 45 students at the University of Washington and for experiment 2 there were 150 student participants. The PP’s were shown 7 short film clips from safety films for driver education of traffic collisions.
5) Parachute was dropped from inside the classroom (1st level of the building) 6) Stopwatch was used to measure the time the parachute took to reach the ground. 7) Repeat 1-7 using garbage bags. Results |Type of parachute |Attempt number |Time taken to reach the ground |Average time taken to reach the | | |
Research Question : What is the terminal velocity of a ball bearing in glycerin? Independent Variable: Distance travelled Dependent Variable : Time Controlled Variable(s): Height of Release Apparatus : * Glass Tube * Glycerin * Ball Bearings (3-4 mm in diameter, iron) * Clamps * Meter Stick * Stand * Iphone’s “Stopwatch app” Using a meter stick every 5 cm incresements were pointed out on to the side of the tube. Care was taken to start the measurements at the top level of glycerin, the bearing was released at the top of the tube. The time was measured by a group of Three people , one releasing the bearing ,second carefully observing the bearing as it fell through glycerin, third handling the stopwatch .Second person called out “lap” every time the bearing passed one of the 5 cm marks on the tube, after this call a person holding a stopwatch was supposed to obtain the split time between each of the 5 cm markers. The uncertainty in the distance is ±0.5 cm because the ruler had 1 cm markings.
We used a vernier caliper to obtain the diameter of those two and therefore, the radius. When adding all the numbers together, we found that the true radius(r) of the orbit was 0.139 m. To find our tension, we needed to find out how much weight we needed to pull the object towards away from the spring and on the tip of the pointer as shown below. The tension needed to pull the mass on the tip of the pointer 1.05 kg. In theory the force of acceleration needed to pull the mass to same exact spot should equal the force of tension multiplied by the force due to gravity. Using Newton’s second law, F=ma, we know that the
Pendulum Aim: To investigate the time for 1 oscillation for different lengths of pendulum and different masses for the pendulum bobs Hypothesis: The time taken for oscillation is proportional to the lengths of the pendulums Apparatus: * A retort stand * Strings * Masses( big, medium and small balls) * Metre ruler * Stopwatch Procedure: 1. Fix the iron stand on the bench 2. Hang the mass on the end of strings and the iron stand 3. Measure the lengths of pendulum with the metre rule 4. Displace the masses to cause oscillation 5.
Aim: To determine the reaction time of a student. Variables: The distance the metre stick fell. Constants: The acceleration due to gravity. The time the metre stick took to fall. List of apparatus: one metre rule one stop watch Set up diagram: Method: 1.