Kinematics Question 24
Question: A body is at rest under the action of three forces, two of which are $ {{\vec{F}}_1}=4\hat{i},{{\vec{F}}_2}=6\hat{j}, $ the third force is [AMU 1996]
Options:
A) $ 4\hat{i}+6\hat{j} $
B) $ 4\hat{i}-6\hat{j} $
C) $ -4\hat{i}+6\hat{j} $
D) $ -4\hat{i}-6\hat{j} $
Correct Answer: D $ F_1+F_2+F_3=0 $ therefore $ 4\hat{i}+6\hat{j}+F_3=0 $ $ {{\vec{F}}_3}=-4\hat{i}-6\hat{j} $
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