To lift heavy object correctly means protecting the back and waist from strain and the ensuring that the full loading on you is on the muscles (of the legs and hands).
To lift correctly, come as close as possible to the load. Keep the back as straight as you can. Lower the waist as low as possible and position your legs to carry the loading on you. Grab the load and lift. Spring and move your legs to reposition to required position.
you lift a heavy object by using the strength in your knees, rather than using the strength in your back. bend your knees to the ground, get a good grip of the object (use protection gloves if needed) and slowly but carefully un bend your knees and stand up straight. This protects your back from going out and causing strain on it.
That depends how high you want to lift it.
it isn't easy for one person because one person doesn't has much mass but when two people mass is added, so they can lift a heavy object
Hernias sometimes happen in the abdomen from straining to left heavy objects.
evaluate the object to be lifted
Probably you are using the board as a lever.
Lever Hoist
Only if you snag the bar with the heavy object and tear it.
which requires more energy, pulling a load, lifting, or pushing a load?
lift it onto some weighing scales pick it up
it can't. trust me, Im a teacher.
Befopre you lift a heavy object:understand the weight of the objectGet help in lifting it if necessaryassume an appropriate posture for lifting
Yep! I am not sure what class but it is! Levers help lift heavy objects. Levers work by the farther you are from the fulcrum or pivot as compared to the heavy objects, the lesser the force you will need to lift or pull the object.