Question

the resulting of two forces of magnitude 8N and 15N is 17N . the angle between the forces of 8N and 15N is​

Answer 1

Answer:

Explanation:

Let F1=8N

    F2=15N

Let $\alpha$ be the angle between F1 and F2

Given Resultant=17N

Resultant force=$\sqrt{(F1)^2+(F2)^2+2(F1)(F2) cos\alpha }$

17=$\sqrt{(8)^2+(15)^2+2*8*15*cos\alpha }$

By squaring on both sides

(17)^2=64+225+240*cos$\alpha$

289=289+240*cos$\alpha$

240*cos$\alpha$=0

cos$\alpha$=0=cos 90

$\alpha$=90 degrees

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