Answer:
Explanation:
Given that,
Mass the weight lifter want to lift is 100kg
M = 100kg
And the lifter will raise it to height of 1.5m
h = 1.5m
We want to find the work done by the lifter.
The workdone by the lifter is the gravitational potential work
The workdone by lifting a body is calculated using
Work done. = force × distance
In this case, the force is the weight of the body and it is calculated using
W = mg
Where g = 9.81m/s²
The distance is the height the body is raise
Then,
The work done becomes
W = mgh
W = 100 × 9.81 × 1.5
W = 1471.5 J
