If a bullet is shot into a suspended mass and does not pass through why can you not just use conservation of energy?
Energy will be lost due to the plastic deformation of the mass as the bullet enters the mass. However momentum will always be conserved, so you can use this to find the speed of the mass when the bullet enters.
DD
Related PAT University answers
All answers ▸Find all real solutions of (x^2 +4x +3)^(x^2 -6x+8) = 1
A matchbox of height h and uniform density stands on its end on a table with coefficient of friction μ. For accelerating it horizontally, at acceleration a, whilst upright, at which height y should the acceleration be applied?
How many trailing zeros are there in 100! (100 factorial)?
Physics PAT 2017 question 20 https://www2.physics.ox.ac.uk/sites/default/files/page/2011/02/14/pat-2017-paper-42578.pdf