Question

someone please solve this! ​

Answer 1

Explanation:

work done=F.S

W=F.(r2-r1)

W=(5i-3j+2k)(-7i-5j-k)

W = -22units

but work cant be negative

so may be 22units is the answer

Answer 2

Answer:

$r_{2} - r_{1} = - 7i - 5j - k$

GIVEN FORCE VECTOR :–

$f = 5i - 3j + 2k$

SO, WORK DONE –

$work \: = \: f.( r_{2} - r_{1}) \\ \\ work = (5i - 3j + 2k)( - 7i - 5j - k) \\ \\ work = - 35 + 15 - 2 = - 22 \: unit$

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