Question

Find the moment about the point ( 1,-1,-1) of the force 3i + 4i - 5k acting at the point (1, 0,-2)

Answer 1

Answer:

Torque = 3j-3k

Torque= FxL

length of Torque arm is 0i+ 1j- 1k

force vector is 3i + 4j-4k

taking vector product Fx L

i( 4-4) + j ( 0+3) + k ( 0-3)

Torque = 3j-3k