Question

what is the torque of the force F= 2i-5i-4k acting ot the point r= 3i + 3j+3k m about the origin​

Answer 1

Answer:

Torque =

r

ˉ

×

F

ˉ

Where

r

ˉ

is the arm vector from axis of rotation to the point of application of force.

∴

r

ˉ

=(3−0)

i

^

+(2−0)

j

^

+(3−0)

k

^

= 3

i

^

+2

j

^

+3

k

^

,

⇒ Torque= (3

i

^

+2

j

^

+3

k

^

)×(2

i

^

−3

j

^

+4

k

^

)=17

i

^

−6

j

^

−13

k

^

Explanation:

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Answer 2

17i^-6j^-13k^ N-m

is the answer