Bend your knees.
lifting heavy objects
permanet object
more than force muscles fibres inside the body are mainly responsible for lifting heavy load.force comes from them to lift the heavy load.
lifting any heavy material
because if the heavy objects have a round bottom they will float
bend your knees and ask for someone to help.
No. You always keep your feet apart.
For lifting and stacking heavy objects
yes
Yes.
A pulley is the best way.
lifting heavy objects
lifting heavy objects
muscular strength
muscular strength
permanet object
For lifting heavy objects that would be awkward or hard for a regular crane to do.