When a Junked Car Is Crushed?

When a junked car is crushed into a compact cube, the mass and its weight will not change but its volume will be reduced.

Does mass change when crushed?

If a can is crushed, the mass will not change because ideally, no parts of the can is removed from it or any other mass added to it.

Is the string tension greater in the upper or the lower?

Is mass or weight more important this time? A: Upper string because it supports the weight of the ball in addition to your pull. The lower string supports only your pull. The upper string is more likely to break.