Physics

Problem

A laboratory spring balance has been tested and found to extend by

2.5\,\text{cm}

when a force of

49\,\text{N}

is applied. (a) A block is hung from the balance and produces an extension of

3.2\,\text{cm}

. Calculate the mass of the block in kilograms. (b) If the same block were taken to a planet where the value of

g

12.0\,\text{m s}^{-2}

and hung from the same balance, what extension would you expect?