You stand on a spring scale on the floor of an elevator. of the following, the scale shows the highest reading when the elevator:
moves upward with increasing speed
moves upward with decreasing speed
remains stationary
moves downward with increasing speed
moves downward at constant speed

move upward with increasing speed

I draw fbd diagram , see in figure

when lift going upward -

F - mg = ma

f = m( a + g)

scale so highest reading

12000j is work done

report!

explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."