The amount of work done by two boys who apply 200 n of force in an unsuccessful attempt to move a stalled car is?

             Work = (force) x (distance)

It doesn't matter if the whole football team is pushing on it.
Until the car moves, no work has been done.

Answer: buoyancy forceexplanation: in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

Efficiency is an action of doing something. for example when you take a test. good efficiency means you did well but bad effeciency or no effiency means you did bad.