Thanks Syndicate
why will the toy truck be weightless ?
also in my working out my final answer had the normal force as up what did i do wrong (working out is below) ?
let down be positive
You did everything right, except the last line. You already got a negative normal force (-7.31 N), which means that the normal force will face in the direction of gravity (which will always be downwards, so it should be 7.31 Ndown)
As for the toy truck being weightless.
As both forces (gravity and normal force) will be facing downwards, the toy truck will seem to be weightless.
Think it about this way:
When you freefall, you would feel weightless, as there is no force impacting in the opposite direction of gravity ( I think, there is no normal force, when an object is free falling).