A bullet of mass 20 g moving with a speed of 500 m/s strikes a wooden block of mass 1 kg and gets embedded in it. Find the speed with which block moves along with the bullet.
 

Dear Student
m1 = 20g = 0.020kg

u1 = 500m/s

m2 = 1kg

u2 = 0
 
For final mass = (m1 + m2) =(1+0.020 )  =1.020 kg
vfinal = ?

m1u1  + m2 u2 = mv


0.02 × 500 + 0 = (1 + 0.02) v

10 = 1.02v

10 / 1.02 = v

v = 9.80m/s

Regards

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