a world record holder lifted 261 kg to height of 2.3 m in 4 sec . assuming g = 10 m/s^2
find 1. weight lifted ,  2. work done by the lifter 3. power developed by the lifter

Dear student,
(a) Weight lifted by him = m x g = 261 x 10 = 2610 N.

(b) Work done by him = F x d = 261 x 2.3 J = 6003 J.

(c) Power developed by him = Work in J/Time in s = 6003/4 Watt = 1500.75 W.

Regards!!