wouldn't the block and projectile move together for a short period of time, hence experiencing a friction force (where N is the normal force under the mass of both the projectile and the block) which adds an external impulse ? are we neglecting this for the simplicity of the problem ?
wouldn't the block and projectile move together for a short period of time, hence experiencing a friction force (where N is the normal force under the mass of both the projectile and the block) which adds an external impulse ? are we neglecting this for the simplicity of the problem ?