Howuch work does it taje to move a 5kg box up/a 10m tall flight of stairs

490 J

Explanation:

The work done to lift an object is equal to its increase in gravitational potential energy, therefore

where

m is the mass of the object

g = 9.8 m/s^2 is the acceleration of gravity

h is the increase in height of the object

In this problem,

m= 5 kg

h = 10 m

Therefore, the work done is

the answer is a. hope this .

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this