# If force F=4i^-10j^N is applied at rim of disc at a distance r=-5i^-4j^ from the axis of rotation of the disc find the torque applied

1
by bhaja

Log in to add a comment

by bhaja

Log in to add a comment

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

Torque is a vector quantity. I assume r is in meters. it is not specified.

*Torque =*** r x F** is the cross product of Force and distance between the force and the axis about which the torque is found.

So*torque* is = ( - 5** i** - 4** j**) **x** (4 **i **- 10** j **)

= -5 * 4**i x i** + 5 * 10** i x j **- 4 * 4** j x i **+ 4 * 10** j x j **

= 0 + 50**k +** 16 **k +** 0

= 66**k ** newton-m

the direction is in the +ve z axis and magnitude is 66 newton-metres

So

= -5 * 4

= 0 + 50

= 66

the direction is in the +ve z axis and magnitude is 66 newton-metres