Question

find the torque of a face 7i+3j+5k about the origin the force acting on a particle whose position vector i+j+k​

Answer 1

Answer:

pls mark me

Explanation:

Here r=

i

^

−

j

^

+

k

^

and F=7

i

^

+3

j

^

−5k.

We shall use the determinant rule to find the torque τ=r×F

τ=

∣

∣

∣

∣

∣

∣

∣

∣

i

^

1

7

j

^

−1

3

k

^

1

−5

∣

∣

∣

∣

∣

∣

∣

∣

=(5−3)

i

^

−(−5−7)

j

^

+(3−(−7))

k

^

or τ=2

i

^

+12

j

^

+10

k

^