Correct Answer:
D. Zero
Correct answer: Zero. At the Earth’s centre the gravitational pulls from all sides cancel out, so the weight is zero.
Background: Weight is the force of gravity on an object.
- 66 N: 66 N is not the weight at the centre.
- 200 N: 200 N is the weight at the surface.
- 100 N: 100 N is not the weight at the centre.
Did you know? Mass stays the same, but weight becomes zero.
Memory trick: Centre of Earth = zero weight.