Apparent weightlessness and all

[Chavi]

implies that the object is stationary on a flat surface.
For these 4 mark questions I'd say for full marks you need to:

1) Define Weight, Apparent Weight, Apparent Weightlessness and True Weightlessness
2) Mention that the object is in free fall, so the Normal reaction force = 0
3) Prove the N=0 using calculations
4) Add that a gravitational force, g, is still acting on the object. Thus, there is only a sensation of weightlessness (as Apparent weight is measured by the Normal force), which differs from true weightlessness where g=0 (in deep space)

Why would you have to define true weightlessness when it asks for apparent weightlessness?

So that you show the VCAA examiner that you know the difference between these two easily confused concepts.

[lachymm]

You could add it but i doubt it would be required for full marks.

[m@tty]

All I'd say for those questions is:

~ Object is in free-fall, there is no reaction force.
~ Weight is still present, but is not realised as reaction is zero.
~ Hence he/she is experiencing apparent weightlessness.

Are these really four mark questions? I've forgotten how many they were in the papers I've done..

@Chavi  If there is a non-zero net force acts on a body then it is impossible for the body to be stationary. I was talking about net force, not reaction force.

And I still don't see how the 'calculations' actually help further your argument.