Pandora, it is actually a really easy question!
But, first of all, I think you have typed it wrongly that acceleration is 2m per second square, NOT PER SECOND. Check it out in your book!!
Regarding the answers:
b) When the lift accelerates upwards, a net upward force is required to accelerate the lift. The force R exerted by the lift floor is greater than our weight MG, right? Therefore, the net force is R-mg=ma
Thus, weight of the women=mg=60kg x 10 m per second square=600N
R-600N=60kg x 2m per second square
Therefore, the reading of the scale is 72kg!!!
C)much more easy, The reading = the mass of women = 60kg!!!
d.) As I have mentioned in B, it have a similar equation mg-R=ma Since when the lift accelerates downwards, a net downward force is required. The force R exerted by the lift floor is less than our weight mg.
R-600N=70kg x -3m per second square
Therefore the reading will be 39kg!!
Hopes it can help!
PS Actually, I am a grade10 students in Hong Kong, ( a city of China ) and your question help me revise the stuff!! Thanks anyway. When I compared your question to my question here, I found that my question is actually 10 times more harder!!