Question

statement A if an object is lifted from the ground to a certain height work done by the gravitational force is negative statement B if an object is lifted from the ground to a certain height work done by lifting force is positive

Answer 1

Both of these statements are correct. This is because :-

Statement 1 :-

Work is done but in opposite direction. Therefore, work done becomes negative.

Statement 2 :-

Work is done in direction of displacement produced. So, work done is positive.