Question : A point of application of a force F⃗ = 5î− 4ĵ+ 2k̂ is moved from r⃗1 = 2î+ 7ĵ+ 4k̂ to r 2 = 5î+ 2ĵ+ 3k̂ the work done is
(A) 22 units
(B) -22 units
(C) 33 units
(D) -33 units
Answer : option (A)
Solution :

Question : A point of application of a force F⃗ = 5î− 4ĵ+ 2k̂ is moved from r⃗1 = 2î+ 7ĵ+ 4k̂ to r 2 = 5î+ 2ĵ+ 3k̂ the work done is
(A) 22 units
(B) -22 units
(C) 33 units
(D) -33 units
Answer : option (A)
Solution :