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Statement-1 : To unscrew a rusted nut, w...

Statement-1 : To unscrew a rusted nut, we need a wrench with longer arm.
Statement-2 : `overset rarr(tau) = overset rarr(r ) xx overset rarr(F)`.

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Statement-1 : Torque is a vector whose direction is along the applied froce. Statement-2 : overset rarr(tau) = overset rarr(r ) xx overset rarr(F)

Let overset(rarr)C = overset(rarr)A+overset(rarr)B then :

Let overset(rarr)C = overset(rarr)A+overset(rarr)B then :

(A) : To unscrew a rusted nut, we need a wrench with longer arm. (R ) : Wrench with longer arm reduces the torque of the arm.

If overset rarr A + overset rarr B = overset rarr A - overset rarr B ,then:

Projection of overset(rarr)P on overset(rarr)Q is :