Write two different vectors having same ...

Write two different vectors having same direction.

Text Solution

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Consider `vec a=2hati- hatj+2 hatk` and `vec b=4hati-4hatj+2hatk`
Direction cosines of `veca` are `2/3,-1/3,2/3`
Direction cosines of `vecb` are `2/3,-1/3,2/3`
Thus, `veca ` and `vec b` are two different vectors having same direction.

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Knowledge Check

Which of the following is an example of two different vectors with same magnitude ?

A

`(2hati + 3hatj + hatk) " and " (2hati + 3hatj - hatk)`

B

`(3hati + 5hatj + hatk) " and " (3hati + 4hatj + hatk)`

C

`(hatj + hatk) " and " (2hatj + 3hatk)`

D

none of these

When two wires have current in same direction then force is

A

Attractive

B

Repulsive

C

Both attractive and repulsive

D

Can't be determined

STATEMENT 1: Two quantities with different dimensions may have same unit. STATEMENT-2 Two quantities with different units may have same dimensions STATEMENT-3 Unitless quantities must be dimensionless too

A

TFT

B

TFF

C

TTT

D

FTT

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