If the smaller mass is more dense, like a spoon lifting an inflated balloon. Or if the smaller mass has more electromagnetic properties then the larger one, like a small magnet being able to lift a pile of nails.
Large stone has more mass compare to a small one. And mass is directly proportional to weight where 'g' is constant for every object on earth. As a result larger stone has more weight than that of smaller. That's why it is difficult to lift larger stone on the surface of the earth but easier to lift a smaller one.
The density will not be as large as one with the same mass which is spread over a smaller volume.
If the units are the same, that will be the one with the smaller number of units.
The larger the wheels have a higher center of mass than a smaller one. The higher the center of mass, the smaller the tilt needed to cause the wheel's center of mass to move outside its base and cause the wheel to roll over.
A lot of different things move in one large mass. One common example is a glacier, a large mass of ice that moves as one unit.
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
A strait, or straits, eg, the Straits of Gibraltar, the Bass Strait.
About 0,85
A hydraulic lift works by having pressure travel through a tube into another. One tube is smaller forcing air into the larger one in order to push and raise the lift.
It depends on how much mass the taller person has. Normally, a persons whos mass is one-third the person they are carrying can lift it with enough effort
Slump
Up to one ton, apparently..