Physics help!!!!

Question

Two friends, Joe and Sam, go to the gym together to strength train. They decide to start off with an exercise called flat bench 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  barbell. Joe is taller than Sam, which means Joe's arms are  long whereas Sam's are  Calculate the work done by Joe  when he raises the barbell to finish one repetition. The acceleration due to gravity is 9.81 m/s^2

How does the amount of work Sam does lifting the weight compare to that of Joe?

Answer 1

The work done by Joe in raising the barbell = .686*43.5*9.81= 292.3 Joules ... The work done by Sam in raising the barbell = Length*43.5*9.81 Joules. The length of Sam's arms is not given