What is the weight of a body having a mass of 10 kg if it is falling freely?
Answer: The apparent weight of a freely falling body is zero.
When a body falls freely, it is falling with an acceleration =g. Thus the entire gravitational force acting on it is utilized in accelerating it and hence its weight is not felt.
Rachna Sharma asks:
“The charge on a proton is +1.6x 10 -19C and that of electron is -1.6x 10 -19C. Does it mean that the electron has a charge 3.2x 10 -19C less than the charge of a proton?”
There are two kinds of charges. It was a historical accident to name one of it + and the other –
The ancient name for + was vitreous and that of – was resinous.
The magnitude of charge for proton and electron are the same but the nature of charge is different.
Hope the idea is clear. If not, please post further doubts as comment to this post.