press. Lying flat on a bench with his arms in an extended position, each friend slowly lowers $($to his chest$)$ and then raises a barbell back to the starting position.

They start off by using a $34\mathrm{.}5$ kg barbell. Joe is taller than Sam, which means Joe's arms are $68\mathrm{.}8$ cm long whereas Sam's are

$61\mathrm{.}8$ cm$.$

The acceleration due to gravity is $9\mathrm{.}81$ m$/$s$^2$

Calculate the work WJoe done by Joe when he raises the barbell to finish one repetition.How does the amount of work Wam that Sam does lifting the weight compare to that of Joe?

$$ WSam $<$ WJoe

$$ WSam $>$ Wjoe

$$ WSam $=$ Wjoe