Question

Two forces of magnitude Aand B are acting at right angle to each other. The magnitude of their resultant is *

(a)A+B

(b) A - B

(c) √(A²+B²)

(d) √(A²-B²)

​

Answer 1

Answer:

the answer is c

Explanation:

$r { }^{2} = a {}^{2} + b { }^{2} + 2ab \cos( \alpha ) \\ r { }^{2} = a { }^{2} + b {}^{2} + 2ab \cos(90) \\ r = \sqrt{a {}^{2} + b {}^{2} }$

cos90=0

i hooe you will understand

Answer 2

Answer:

abcdabcdabcdabcdabcd