Question

Question #40a2f

Answer 1

(a) `0^@`
Since the magnitude of resultant is equal to the sum of magnitudes of two displacements.
`|vecR|=|vecA|+|vecB|`

(b) `180^@`
Since the magnitude of resultant is equal to the difference of magnitudes of two displacements. (assuming `|vecA|>|vecB|`)
`|vecR|=|vecA|-|vecB|`
(b) `90^@`
Since the square of magnitude of resultant is equal to sum of squares of magnitudes of two displacements. This is true only in case of a right triangle.
`|vecR|^2=|vecA|^2+|vecB|^2`