How It Works To calculate the distance travelled, we need to know the initial velocity and the time it took for the ball to hit the floor. You may need a few sheets in order to make sure the various landing positions can be recorded. One different thing to test would be the affect of friction on an object over a lasting period of time. Making a graph using a computer While it is important to know how to plot data by hand, in practice physicists typically use a computer program to plot data. The plotting tool program automatically does a linear fit to your data, and also provides the slope estimate and its uncertainty. This will help me get a better understanding of the force of air resistance. Our percent deviation in the range was 10% which is rather high considering the experiment and conditions.
Because horizontal and vertical information is used separately, it is a wise idea to organized the given information in two columns - one column for horizontal information and one column for vertical information. This heart pounding scenario is one example of horizontal projectile motion. You will perform two experiments to aid your understanding of these principles, which will be described later in the lab. Take at least one set of data for each person in your lab group. First, to find the maximum range at which the ball travels, the ball had to be fired at various angles. Forces: Often a force is described as a push or a pull.
The speed of the balls out of the launcher should not depend on the heights of the launcher. This applies to long jumpers and soccer balls that are two good examples. During data collection, you should tape the carbon paper with a piece of white paper underneath it to the floor, so that the ball will hit the paper and leave a mark of its landing point from wherever it is released on the ramp. Each launcher should be clamped to the edge of a lab bench and aimed so that the ball will land on the floor without hitting any other lab groups. Projectile motion into physics Objective: Our purpose for this lab was to observe projectile motion and use the equations of motion to predict the objects location in different instances of time. Basing off my knowledge of physics, the relationship between a projectile and its angle depends on how large the angle is: the larger the angle, the shorter the distance between the launcher and the landing point. From this, you can calculate the vertical distance that it fell and compare your calculated value and the measured value.
Discussion Questions What is the relationship between initial velocity and the distance traveled? Where should you reach to grab it before it hits the floor to stop the screen from shattering? How do you think increasing the initial velocity would affect how far the ball traveled? Also, the time of flight can be found. Two angles are complimentary if they, when added together, equal 90 degrees. Put the time-of-flight plate on the floor where the ball lands. Practice and patience are required to ensure that the ball accurately lands on the pad and the time of flight is properly recorded. Determine the initial horizontal velocity of the soccer ball. Our next objective is to determine at what angle that the ball will be ejected at the maximum range. Since each equation has four variables in it, knowledge of three of the variables allows one to calculate a fourth variable.
While problems can often be simplified by the use of short procedures as the one above, not all problems can be solved with the above procedure. If there were any other force acting upon an object, then that object would not be a projectile. Whenever you launch a ball, position one member of your lab group ready to catch the ball after it lands to avoid losing the ball or interfering with other students in the room. The path followed by a projectile is called its trajectory. Solving Projectile Problems To illustrate the usefulness of the above equations in making predictions about the motion of a projectile, consider the solution to the following problem.
The only velocity it has is just its horizontal velocity, vx. The vector nature of forces can be used to determine how far an object launched can go and its initial velocity at an angle of 0 by finding its x and y components separately. First, to find the maximum range at which the ball travels, the ball had to be fired at various angles. The components of velocity are found by taking the initial velocity multiplied by sin for the y component, and cos for the x component. Since these two components of motion are independent of each other, two distinctly separate sets of equations are needed - one for the projectile's horizontal motion and one for its vertical motion. Physics, particularly Uniform Accelerated Motion can be seen in many rides in an amusement park. Find a starting point on the launcher that gives the ball a reasonable velocity.
In this experiment we learned how to determine the initial velocity of a ball that is launched horizontally out of a projectile launcher, how to verify the angle of projection that will produce maximum range, and to predict and verify the range that a ball will travel when launched at a set angle. Imagine starting at the origin, you can reach a destination position by first moving along the x axis and then along the y axis. Initial velocity: The photogates are approximately 10 centimeters apart measure directly to confirm this. Students must have some basic algebra skills and knowledge of physics. Once a projectile has been launched, the only forces acting are: Air friction this is considered negligible in our experiment Lift force, if the object is behaving like a wing this is also negligible as our object is a ball Gravity, the weight force which acts downwards this is the value we will be calculating in our experiment In our experiment we will measure the projectile motion of a bouncy ball using the computer programme Motion Tracker. What sources of error may have impacted your results? The range of the tests was. The Newtonian mechanics principles that you have been studying allow you to predict this type of motion quite well.
The period of swing decreased as the period T increased. The forces involved in projectile motion are the initial velocity of the projected object at a certain angle and gravity acting downward on the object. Unfortunately, there is no printer in the lab room or in the Physics Help Room, but the plotting tool allows you to send your graph to your email account to print out or copy directly into your report later. The solution of this problem begins by equating the known or given values with the symbols of the kinematic equations - x, y, v ix, v iy, a x, a y, and t. Theory: Projectile motion according to Dr. The shell fired at an angle closest to 45 degrees lands farther away.