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Two forces are acting on a same body `vec(F_(1))=(2hat(i)+3hat(j)-hat(k))` and `vec(F_(2))=(hat(i)+2hat(j)+4hat(k))`, then find component of `vec(F_(1))` along `vec(F_(2))`.A. `((4)/(7sqrt(6)))`B. `(4)/(9sqrt(5))`C. `(4)/(sqrt(21))`D. `(7)/(4sqrt(6))` |
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Answer» Correct Answer - C `vec(F_(1))implies2hat(i)+3hat(j)-hat(k)` `vec(F_(2))implieshat(i)+2hat(j)+4hat(k)` `F_(1)cos thetaimplies (vec(F_(1)).vec(F_(2)))/(|F_(2)|)implies(2+6-4)/(sqrt(21))implies(4)/(sqrt(21))` |
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