Prelab Exercises and Questions Prelab Data/Analysis Postlab /30 1. Before collec
ID: 1778803 • Letter: P
Question
Prelab Exercises and Questions Prelab Data/Analysis Postlab /30 1. Before collecting and analyzing the experimental /60 data for this experiment, it is useful to first analyze a few simple collisions Start with an inelastic collision between a 3kg mass in motion and a 2kg mass at rest Calculate the total momentum and the total kinetic energy before and after the collision. Total /100 Initial Conditions 1kg Momentum of 4kg mass- Momentum of 1kg mass = Total Momentum before = Kinetic energy of 4kg mass- Kinetic energy of 1kg mass - Total kinetic energy before = Final Conditions 5kg Momentum of 5kg mass - Total Momentum after= Kinetic energy of 5kg mass = Total kinetic energy after = 2. Was total momentum conserved in this collision? (yes or no)Explanation / Answer
Since 4 kg mass is moving and 1 kg is at rest so
at initial conditions
momentum of 4 kg mass=mv=4*5=20kgm/s
momentum of 1 kg mass=1*0=0
kinetic energy of 4 kg mass=1/2mv*v=1/2*4*5*5=50J
kinetic energy of 1 kg mass=0 because object is at rest
total kinetic energy= Energy of 4kg mass=50J
After collision
momentum of 5 kg mass=mv=5*4=20kgm/s
total momentum=20kgm/s
kinetic energy of 5 kg mass=1/2*m*v*v=1/2*5*4*4=40J
total energy=40J
2) yes momentum is conserved in this collision but energy is not.