4. A weightlifter raises a mass mat a constant speed to a height h in time t. Which of the following
1 answer:
Answer:
<h3>a. mgh</h3>
Explanation
The work done by the lifter is equal to its potential energy since he is covering a height and under the influence of gravity.
potential energy = mass * acceleration due to gravity * height
m is the mass
g is the acceleration due to gravity
h is the height
Hence the required workdone = PE = mgh
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The answer is D. I hope this helps
