find the magnitude and direction of the vector r=3i−4j to the nearest degree (a) 7N 143^0 (b) 5N 143^0 (c) 5N 127^0 (d) 7N 127^0


Question and Answers Forum

All Questions Topic List
None Questions
Previous in All Question Next in All Question
Previous in None Next in None
Question Number 132116 by aurpeyz last updated on 11/Feb/21

$f i n d t h e m a g n i t u d e a n d d i r e c t i o n o f$ $t h e v e c t o r r = 3 i - 4 j t o t h e n e a r e s t$ $d e g r e e$ $(a) 7 N 143^{0} (b) 5 N 143^{0} (c) 5 N 127^{0}$ $(d) 7 N 127^{0}$
	Answered by Olaf last updated on 11/Feb/21

	$∣ r ∣ = \sqrt{3^{2} + {(- 4)}^{2}} = 5$ $\arg r = \arctan (- \frac{4}{3}) \approx - 53 ° = 127 ° [180]$ $\Rightarrow (c)$
	Commented by aurpeyz last updated on 20/Mar/21

	$w h a t d o e s 127^{0} [180] m e a n s ?$ $i t h o u g h t i t s h o u l d b e 270 + 47 = 317^{0}$
Terms of Service
Privacy Policy
Contact: info@tinkutara.com

Question and Answers Forum