ExamBro
ExamBro
enEnglishhiहिन्दीguગુજરાતી
JEE Mains · Physics · STD 11 - 6. system of particles and rotational motion

જે કણનો સ્થાન સદિશ \((\hat{i}+\hat{j}+\hat{k})\) છે, તેના પર લાગતા બળ \((2 \hat{i}+\hat{j}+2 \hat{k})\) ને કારણે ઉગમબિંદુને અનુલક્ષીને લાગતું ટોર્ક કેટલું હશે?

  1. A \(\hat{i}-\hat{k}\)
  2. B \(\hat{i}+\hat{k}\)
  3. C \(\hat{j}+\hat{k}\)
  4. D \(\hat{i}-\hat{j}+\hat{k}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\hat{i}-\hat{k}\)

Step-by-step Solution

Detailed explanation

\(\begin{aligned} \tau & =\dot{r} \times \dot{F} \\ \tau & =\left|\begin{array}{lll}\hat{i} & \hat{j} & \hat{k} \\ 1 & 1 & 1 \\ 2 & 1 & 2\end{array}\right| \\ \tau & =\hat{i}(2-1)-\hat{j}[0]+\hat{k}(1-2) \\ & =\hat{i}-\hat{k}\end{aligned}\)
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app