- #1
Justabeginner
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Homework Statement
A force of f= i + 2j- 3k is applied to a particle that moves 10 feet in the direction of i + j. How much work is done?
Homework Equations
W= ||F|| dot product d
The Attempt at a Solution
D= 10 cos 45 i + 10 sin 45 j
D= 5sqrt(2) i + 5 sqrt(2) j
F= i + 2j - 3k
W= ||F|| dot product d
W= sqrt(14) dot product (5sqrt(2)i + 5sqrt(2)j)
W= 5sqrt(28) + 5 sqrt(28)
W= 10sqrt(28)
W= 20sqrt(7)
Is this even right? Thanks!