Question

A bullet of mass 25 g is fired with velocity 400 ms${}^{-1}$ at a bag of sand of mass 4.975 kg suspended by a rope and gets embedded into it. What is the velocity gained by the bag?

• A. 0.2 ms${}^{-1}$
• B. 4 ms${}^{-1}$
• C. 0.4 ms${}^{-1}$
• D. 2 ms${}^{-1}$

Answer 1

The correct option is D 2 ms${}^{-1}$

conserving the momentum of system.
$0.025\ast 400+4.975\ast 0.0=(4.975+0.025)\ast vv=10/5=2m/s$