Answer:
1249.5 J
Explanation:
Given,
Mass of the barbell = 150 Kg
height of the lift = 0.850 m
Work done = ?
Work done = F .s
Force = m g
= 150 x 9.8 = 1470 N
W = 1470 x 0.850
W = 1249.5 J
Hence, the work done to lift the barbell is equal to 1249.5 J
