TITLE: How can an object move at constant velocity in 2 different instances, but in both instances the work done is the same?
QUESTION [0 upvotes]: Here's a bit more clarification. If I pick up an object at a constant velocity across distance h it takes me t seconds. If I pick up the same object at a constant velocity through distance h it takes me 2t seconds. According to my textbook in both cases the work done is the same, but how is this possible? Shouldn't the second instance have a force smaller than the first and thus less work?

REPLY [0 votes]: As the body is moving at constant speed which means all forces are balanced. It means the force is same which equal to 'Mg'.
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