Question regarding momentum conserved in phyisics Ball Mass (kg) Initial Velocit
ID: 1649842 • Letter: Q
Question
Question regarding momentum conserved in phyisics
Ball
Mass (kg)
Initial Velocity (m/s)
Initial Momentum (kg*m/s)
Final Velocity (m/s)
Final Momentum (kg*m/s)
1
1.0
2
2.0
0.76
0.76
2
3.0
1.0
1.0
1.42
4.25
1.Compare the initial and final momentum for ball #1. Is momentum conserved for the individual ball?
2. Explain your previous result based on the existence of a significant net external force (or lack thereof).
3. Compare the initial and final momentum for ball #2. Is momentum conserved for the individual bal
4. Explain your previous result based on the existence of a significant net external force (or lack thereof).
5. Calculate the total initial momentum. Calculate the total final momentum. Compare the two. Is momentum conserved for the system?
6. Explain your previous result based on the existence of a significant net external force (or lack thereof).
Ball
Mass (kg)
Initial Velocity (m/s)
Initial Momentum (kg*m/s)
Final Velocity (m/s)
Final Momentum (kg*m/s)
1
1.0
2
2.0
0.76
0.76
2
3.0
1.0
1.0
1.42
4.25
Explanation / Answer
(1) ans
yes the momentum is converved
the change in momentum P1=0.76-2=-1.24 kg.m/s
(2) ans
the net external force Fnet=P1/t=1.24/1=1.24 N
(3) ans
no the momentum is conserved
the initial momentum pi=3*1=3 kg.m/s
the finial momentum Pf=3*1.42=4.26 kg.m/s
the change in momentum P2=4.26-3=1.26 kg.m/s
(4) ans
the net external force F=P2/t=1.26/1=1.26 m/s
(5) ans
no because
the initial total momentum Pi=1*2+3*1=5 kg.m/s
the finial total momentum P2=0.76*1+3*1.42=5 kg m/s
(6) ans
the total net external force F=5/1=5 N
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