A student carries both a spring balance and a beam balance while travelling from the Earth to the Moon with an identical metallic block.
a. (i) What reading will the beam balance show on the Moon? Give a reason for your answer.
b. (ii) The spring balance reads 60N for the block on the Earth. Calculate the reading of the same spring balance on the Moon, where the value of g is one-sixth that on the Earth.
c. (iii) Explain why the two instruments behave differently when taken to the Moon.