Question #05079

1 Answer
Steelballs
Dec 4, 2017

KE of mass 2= 1.2*10^-8 J

Explanation:

Using conservation of momentum:
m1v1=m2v2

m1= 1.6 * 10^-25 kg
m2= 2.4 * 10^-25 kg

KE of m1=18*10^-9 J =0.5m1v1^2
We can find v1=4.74*10^8 m/s

m1v1=m2v2
v2=(m1v1)/(m2)
v2=3.16*10^8 m/s

KE of m2=0.5m2v2^2=0.5*(2.4*10^-25)*((3.16*10^8)^2)=1.2*10^-8 J

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