A solid steel block shows a reading of 4.9kN on a spring balance at the geographical poles where g=9.83m/s2. Use this information to answer the questions below:
a. (i) Express the given reading in newtons.
b. (ii) Determine the mass of the steel block.
c. (iii) At the equator, g is 9.78m/s2. Calculate the weight of the same block at the equator.
d. (iv) Compute the percentage difference between the block’s weight at the poles and at the equator, showing all steps clearly.