GKFix MCQ Question

How is the work done calculated when moving a particle from r1 to r2 against gravity (r2 > r1)?

• A. W12 = mg(r2 – r1)
• B. W12 = GMEm (r2 – r1)
• C. W12 = –GMEm (1/r2 – 1/r1)
• D. W12 = ½mv²