9 Investigating Change in Momentum Flashcards
why should the runway be tilted when carrying out this experiment
as the trolly travels, friction acts against its motion. to compensate for this the runway is tilted
how would friction effect the results
friction reduces the resultant force acting on the trolley. this will result the velocity of the trolley as it passes through the light gate to be smaller and the gradient of the graph to be shallower
how could friction be further reduced when carrying out this experiment
an air track could be used to reduce contact and therefore friction
how is the start position of the trolley determined
the trolley should be pulled up the runway until the mass hanger is just touching the pulley
how should the light gate be positioned in this experiment
so it is in the centre of the interrupt card
what components should be included when measuring the mass of the whole system
trolley, slot masses, mass hanger and string
how could the distance travelled by the trolley be measured
distance travelled by trolley or distance fallen by hanger
how is momentum determined
mass of system x velocity
what is the change in momentum of the system
initially it is zero and so the change in momentum is the final momentum
how can you calculate the trolleys velocity as it travels through the light gate
width of interrupt card divided by the time in the light gate
how can the uncertainties in time readings be obtained
half the range of repeat readings
what graph can be made to compare your value of M/g to the theoretical value
mT against v can be plotted.
how could multiple light gates be implemented
used to time the experiment meaning there is no need for a stopwatch which reduced uncertainty
