Question

Find the port done in moving an object along
the applied force is F = (21 +33 +7k)​

Answer 1

Answer:

Force,

F

=4

i

^

−3

j

^

+2

k

^

Displacement vector is

s

=(2−3)

i

^

+(−1−2)

j

^

+(4+1)

k

^

=−

i

^

−3

j

^

+5

k

^

Hence, work done

W=

F

⋅

s

=(4

i

^

−3

j

^

+2

k

^

)⋅(−

i

^

−3

j

^

+5

k

^

)=−4+9+10=15units