Posted by Khalifa on Sunday, February 3, 2013 at 6:55am.
v1'=((m1-m2)/(m1+m2))v1 for the bullet =176ms^-1
And for the sandbag at rest
v2'=((2m1)/(m1+m2))v1 =396ms^-1
The bullet is conserved after the bullet comes to rest in the bag.
Hence Mgh= 1/2mv^2.
I got stuck here what is going to be the value of M, is it sum of the two masses. and value of v as well.
And i hope the above is collect.
Thanks
mv=(m+M)u
u=mv/(m+M)=0.045•220/(0.045+5)=1.96 m/s
(m+M)u²/2=(m+M)gh
h= u²/2g=1.96²/2•9.8=0.196 m
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