A 60 kg man pushes off from the 71kg block on ice and slides

A 60 kg man pushes off from the 71kg block on ice and slides away at a speed of 4 m/s What is the speed of the block Calculate answer to one decimal. QUESTION 4 A weight lifter raises a 109 kg barbell to a height of 2.4 m. what is the barbell's potential energy? Calculate answer to one decimal.