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  • Which of the following is trueOption: 1  is 5 times <i

Which of the following is true

Option: 1

5\vec{a} is 5 times \vec{a}, in length and have same direction


Option: 2

-3\vec{a} is 3 times \vec{a}, in length and have same direction


Option: 3

3\vec{a} is 3 times \vec{a}, in length and have opposite direction


Option: 4

-5\vec{a} is 3 times \vec{a}, in length and have same direction


Answers (1)

best_answer

As we learned

Scalar multiplication -

fig 4

- wherein

The directed line segment  becomes m times longer

 

 m\vec{a} is vector whose modulus is \left | m \right | times \vec{a} & when m>0 then direction is same & when m<0, direction is opposite

So, option (A)

 

Posted by

mansi

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