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AP EAMCET202315 May 2023Evening ShiftPhysicsMathematics in PhysicsActual

If F =(4 i -10 j ) N and r =(-5 i -3 j ) m , then ( r F ) is

Options

  1. A(-20 i +3 j ) Nm
  2. B62 k Nm
  3. C10 13 Nm
  4. D38 Nm

Correct answer

B. 62 k Nm

Step-by-step solution

aligned & F =(4 i -10 j ) N & r =(-5 i -3 j ) m & r F = | array ccc i & j & k -5 & -3 & 0 4 & -10 & 0 array | & = k (50+12)=62 k Nm aligned

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