Describe what happens after the collision. Fill in data table below: Object Mass Initial Velocity Final Velocity Initial Mom. A video was taken and analyzed to determine velocity, allowing for future finding of momentum and kinetic energy values. Objective: The objective of this lab is to support that momentum will be conserved in all forms of collisions, and that kinetic energy will be conserved only in elastic collisions. Describe the motion of the balls before and after the collision?. Now what happens after the collision? Which kind of collision would you rather be involved in? The collisions consisted of only two gliders with varying masses and speeds. This interactive simulation lets students investigate simple collisions in one dimension or more complex scenarios.
Include a third vector that represents Pf - the sum of the former two vectors. Also, through this experiment, students know some basic indexes to assess the efficiency of pumps used. The guided track, carts, photogates , 250 g weight and picket fences were the primary components used in the procedural part of the experiment. Both of the percent discrepancies were greater than 60% which indicates inelastic collisions are not as inefficient in conserving energy due to a loss in energy. This have occurred because the collision is inelastic and since there was friction when the two pucks collided, their speed became less, and speed is directly proportional to kinetic energy. All motion is relative to whatever frame of reference is chosen, for there is no motionless frame from which to judge all motion. Hypothesis: Theoretically momentum should be conserved at all times whereas energy is lost if the collision is not a fully elastic one through heat and sound.
Friction was the main cause of inaccuracy in this experiment. However, in the inelastic collision, momentum is conserved while kinetic energy is not. The green ball must initially be at rest. Due to friction from the table and the ticker timer the measurements taken were not 100% accurate. Each glider cart was equipped with a flag, and its passage through a photogate timer was timed.
Investigate the action of a more-massive attacking object striking a less-massive target object. Collisions in 2D Analysis Question: In steps 1 and 2, you drew Pi and Pf. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the area for clarifications. Introduction First of all; we should understand what is linear motion.
Underneath that diagram draw another diagram that shows two vectors - P1f and P2f - the final momentums of ball 1 and ball 2 after the collision. Underneath that diagram draw another diagram that shows two vectors - P1f and P2f - the final momentums of ball 1 and ball 2 after the collision. A car or glider travels on a cushion of air provided which reduces friction. Add a third vector to that diagram Pi - the total momentum before the collision. The percent discrepancies for the equal and unequal mass elastic collisions were 22.
Kinetic energy differed more than what was expected, it was significantly less after the collision, the difference before and after the collision was 63. Make some general statements about momentum and kinetic energy conservation. In step 5 you created a scenario where the final velocity of the target ball was 3× as large as the final velocity of the incoming ball. Include a third vector that represents Pf - the sum of the former two vectors. Scenario 2: Elastic collision between balls of unequal mass, with more massive ball stationary Same as scenario 1, except have unequal masses and the less massive ball is stationary. The objective of the lab was therefore met. The data was collected and translated to a graphical model for further analysis.
The air track is also used to study collisions, both elastic and inelastic. Reset the elasticity to 100%. Whenever one thing exerts a force on another, an equal amount of force is exerted back on it. Run the simulation and draw a diagram that shows two vectors — P1i and P2i — the initial momentums of ball 1 and ball 2 before the collision. With low values of change in momentum and kinetic energy that occurred in elastic collisions, it is understood that both are conserved in this type of collision. Velocity to the right is positive, left is negative.
These measurements will allowed the velocities of the collision partners to be measured before and after they collided with each other. The amount of kinetic energy lost in elastic and inelastic. In the equation time will become less and change in momentum is directly proportional to time. The website also provides lesson plans developed by high school teachers specifically to accompany the Collision Lab simulation. This was found by dividing the final kinetic energy by the initial kinetic and getting a number that was close to one. Variables: The Independent variable is the initial and final mass of the trolley. Access Rights: Free access License: This material is released under a license.
Aim: To find out whether momentum and kinetic energy are conserved. The simpler experiment explores the meaning of elastic vs. What is the relationship between the initial and final total momentums? Important Formulas: Perfectly Elastic Collisions: To begin a collision: To restart a collision: Take some time to familiarize yourself with the simulation and perfect collisions. How do the final velocities of the masses compare to the initial velocity? The results show that momentum and kinetic energy of the system is conserved during an elastic collision while only momentum is conserved during inelastic collision. Any object maintains a constant speed and direction of motion unless an unbalanced outside force acts on it. Note: The collision must remain one dimensional.
Kinetic energy is not conserved during an inelastic collision. Repeat steps c and d. Record the masses using the following table. By finding these, it was possible to determine which kind of collision took place. Final Analysis Question: Summarize the rules for conservation of momentum and kinetic energy in a collision. Users can adjust the mass of the two balls and set the elasticity from zero to 100%. Which is was fairly close in most cases.