A particle moves from a point - 2 i ^ + 5 j ^ to 4 j ^ + 3 k ^ when a force of 4 i ^ + 3 j ^ N is applied. How much work has been done by the force?

Question

A particle moves from a point - 2 i ^ + 5 j ^ to 4 j ^ + 3 k ^ when a force of 4 i ^ + 3 j ^ N is applied. How much work has been done by the force?, 8 J, 11 J, 5 J, 2 J

MARKS App · Accepted Answer

S → = r → 2 - r → 1 = 4 j ^ + 3 k ^ - - 2 i ^ + 5 j ^ = 2 i ^ - j ^ + 3 k ^ F → = 4 i ^ + 3 j ^ W = F → . s → = 8 - 3 = 5 J

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