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  • The initial velocity of a particle is  and acceleration of

The initial velocity of a particle is 2\hat{i}+5\hat{j} and acceleration of the particle is 0.5(\hat{i}+\hat{j}) so it’s speed after 2 sec is 

 

Option: 1

5 units


Option: 2

6.70 units 


 


Option: 3

7.60 units

 


Option: 4

4.5 units


Answers (1)

best_answer

Let us apply the equation 

v=u+at

Therefore,                                                              

v=2\hat{i}+5\hat{j}+2*0.5(\hat{i}+\hat{j})= 3\hat{i}+6\hat{j}

Now,                                                             

\left | v \right |=\sqrt{3^{2}+6^{2}}=\sqrt{45}=6.70\, units

Posted by

Nehul

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