A triangular plate is shown. A force F → = 4 i ^ - 3 j ^ is applied at point P . The torque at point P…

A triangular plate is shown. A force F→=4i^-3j^ is applied at point P. The torque at point P with respect to point O and Q are:

  1. -15-203,15-203
  2. 15+203,15-203
  3. 15-203,15+203
  4. -15+203,15+203

Solution

F→=4i^-3j^

r→1=5i^+53j^ and r→2=-5i^+53j^

Torque about 'O'

τ→O=r→1×F→=-15-203k^

Torque about 'Q'

τ→Q=r→2×F→=15-203k^

Asked in: JEE Main 2021 (17 Mar Shift 1)

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