Question

two foreces of magnitudes 3 unit and and 5 unit act at 60degrees with each other what is the magnitude of their resutant​

Answer 1

$\huge\fcolorbox{red}{yell{Question}$

Two foreces of magnitudes 3 unit and and 5 unit act at 60degrees with each other what is the magnitude of their rresutant.

$\huge\fcolorbox{red}{yellw}{Solution}$

P = 3 units

Q = 5 units

R = ? units

$\boxed{ \: R \: = \sqrt{P² + Q² + 2</u></strong><strong><u>P</u></strong><strong><u>Q</u></strong><strong><u>cosθ}}$

➣ R = √ 3² + 5² + [ 2(3)(5) cos60° ]

➣ R = √ 9 + 25 + [ 30 × 1/2 ]

➣ R = √ 34 + 15

➣ R = √49

➣ R = 7

∴ The resultant of their magnitude is 7.