Question

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

Answer 1

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