Conservation of Momentum Investigation
Physical Science Practical
Table of Contents
Investigative Question 3
Results: Ticker Tape Pieces 5
Does the momentum of an isolated system remain constant even after a collision and does the addition of mass on an object affect the momentum of an object?
The momentum of the isolated system will remain constant after the collision because the law of conservation states that the total linear momentum of an isolated system remains constant.
Ticker timer with ticker tape
Measure the mass of the trolley and then measure the mass of the mass piece
Elevate your trolley runway to compensate for friction
Thread ticker tape through the ticker timer and attach it to the trolley
Put the trolley on the elevated runway and give it a push
Once the trolley has reached the end of the runway, remove the ticker tape and analyse it to ensure that the trolley had been moving at constant velocity. If the spaces between the dots are equal, the trolley has been moving with a constant acceleration.
Repeat step 3 and 4 and then drop the mass piece on the trolley as the trolley reaches the middle of the runway before it reaches the end of it.
Collect the trolley, mass piece and ticker tape from the end of the runway
Cut the ticker tape into segments after every 10 spaces. Stick the pieces of the ticker tape in order onto a piece of paper and analyse the tape.
The point of collision is the point where the graph of the ticker tape stops showing a motion of constant acceleration. Constant acceleration is shown by a constant and gradual increase (or decrease) in distance between the intervals.
Read the frequency of the ticker timer and calculate the time taken to make 10 dots on the ticker tape (t=1/frequency)
Calculate the velocity and momentum of the trolley before the collision (without the mass piece)
Calculate the velocity and momentum of the trolley after the collision (after the mass piece was placed on the trolley)
Repeat this process with 2 different mass pieces
Record your results.
The controlled variables in this practical are the following factors:
The distance of the ramp
The weight of the trolley (use the same trolley for all three trials)
Results: Ticker Tape Pieces
For 0,05 Kg mass piece collision:
For 1kg mass piece collision:
For 1,5kg mass piece collision:
A table showing the changes in momentum and velocity before...