Naim Suleimanoglu of Turkey has a mass of about 62 kg, yet he can lift
nearly 3 times this mass. (This feat has earned Suleimanoglu the nick-
name of "Pocket Hercules.") If the potential energy associated with a
barbell lifted 1.70 m above the floor by Suleimanoglu is 3.04 x 10³ J,
what is the barbell's mass?