200 kg car^^
Work is expressed in Joules, or a Newton meter. So to lift the log five meters would take 25 kiloJoules.
It depends on how big it is and what type it is. We had a mobile (can be driven over the road) crane here last year that could pick up 500 tons. I hear they build mobile cranes that can lift as much as 750 tons. Stationary cranes can lift a lot more, but are harder to move.
420,000 j
Ideally that would be 30 kg-meters.
24000 joules
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.
That depends on the specifications of the crane. The largest crane in the world is capable of lifting 20,000 Metric Tons (tonnes).
The maximum load that the crane can lift is 18 metric tons (39,690 pounds), but the crane cannot lift that much weight if the load is positioned at the end of the jib. The closer the load is positioned to the mast (center of rotation), the more weight the crane can lift safely.
Up to one ton, apparently..
Work is expressed in Joules, or a Newton meter. So to lift the log five meters would take 25 kiloJoules.
minimum 150 joules
10 METERS
1000! To Lift That Much, You Will Need A Crane!
It depends on how big it is and what type it is. We had a mobile (can be driven over the road) crane here last year that could pick up 500 tons. I hear they build mobile cranes that can lift as much as 750 tons. Stationary cranes can lift a lot more, but are harder to move.
24000 joules
Ideally that would be 30 kg-meters.
420,000 j