Strength!other than strength ?
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
Potential energy
Yes
That depends how high you want to lift it.
Any force that is more than 50 pounds will lift a 50-pound object. The greater the force is, the greater the object's upward acceleration, and the sooner the object will reach any given height.
The force of gravity must be greater than the mass of the object
The force of gravity must be greater than the mass of the object
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
The phrase "lift up" means to move an object or person to a higher level. This can be actual movement or metaphorical.
If by plains you mean airplanes, in order for them to lift, they have to go fast enough. Lift is a function of speed. Without enough speed, there's not enough lift. When the plane reaches enough speed, the lift begins.
Hernias sometimes happen in the abdomen from straining to left heavy objects.
minimum 150 joules
Potential energy
Potential energy
[object Object]
It depends upon your strength and conditioning, as well as the configuration of the object to be lifted.
Yes