A5 kg and a 12-kg object approach each other with equal velocities of 25 m/s. What are the velocities after impact if collision is
(a) completely inelastic
b) perfectly elastic
plz answer with diagram
step;1
Given that
mass m1=5 kg
mass m2=12 kg
velocity u1=25 m/2
veloccity u2=-25 m/s
step;2
now we find the finial velocitys of objects in inelastic collision
inthe case of perfect elastic collision
using the law of conservation of energy
m1u1+m2u2=[m1+m2]V
5*25-12*25=[5+12]V
V=-10.3 m/s
step;3
now we find the perfectly elastic collsion
finial velocity of first object V1=(m1-m2)u1/(m1+m2)+2m2u2/(m1+m2)
=(5-12)*25/(5+12)-2*12*25/(12+5)
=-10.3-35.3
=-45.6 m/s
step;3
now we find the velocitiies of second body
V2=2*5*25/(17)+(12-5)*25/17
=14.71-10.3
=4.41 m/s
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