Question

please help me so it asap​

Answer 1

Answer:

-17J

Explanation:

$F =2i+3j-4k$

$r1 = 2i+3j-4k\\\\r2 = -i+2j-2k$

$rnet =r2-r1 = (-1-2)i+(2-3)j+(-2+4)k = -3i-j+2k$

$Work = F.rnet$$=(2X(-3))+(3X(-1))+(-4X2) =-6-3-8 = -17J$