Here are a few possible answers:
- The box has a mass greater than that movable by the lifter.
- The box is not sturdy enough to contain the contents when lifting.
- The box is positioned so that the bottom cannot be reached, and there are no attachment points on which to fasten lifting devices.
There may be other possibilities.
No, armour would have been too heavy for them to lift.
pride
The pulley was discovered to lift objects that would otherwise be too heavy to lift. Much in the way a crane is used to lift cargo onto ships.
No, it would be too heavy to fly and too expensive to buy.
A chair lift is used because otherwise it would be too heavy. The benefits are that the person does not have to do it manually , thus, saving their back from getting hurt.
The battery would be too heavy to lift
an advantage
You should not lift heavy things when you are pregnant.
The cylinder may be too heavy too lift
When the box is too heavy or the table too rough.
Depends greatly on the chemical: a gallon of helium or hydrogen will have negative weight, while a gallon of lead would be too heavy to lift.
She was carrying a large, heavy box. African elephants are very heavy!