First slide

Scalars and Vectors

Question

There are two force vectors, one of 5 N and other of 12N . At what angle the two vectors be added to get resultant vector of 17 N, 7 N and 13 N respectively

Easy

A

$0^{\circ}, 180^{\circ} and 90^{\circ}$
B

$0^{\circ}, 90^{\circ} and 180^{\circ}$
C

$0^{\circ}, 90^{\circ} and 90^{\circ}$
D

$180^{\circ}, 0^{\circ} and 90^{\circ}$

Solution

For 17 N both the vectors should be parallel i.e. angle between them should be zero.
For 7 N both the vectors should be antiparallel i.e. angle between them should be 180^o.
For 13 N both the vectors should be perpendicular to each other i.e. angle between them should be 90^o.

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