Question

Calculate the angle between two forces
8 N and 6 N, so that their resultant is
10 N
20​

Answer 1

Answer:

90°.

Explanation:

Let the angle between them be A.

Using triangle law of vector addition:

= > 10 = √[ 8² + 6² + 2(8*6)cosA ]

= > 10² = 64 + 36 + 96cosA

= > 100 = 100 + 96cosA

= > 0 = 96cosA

= > 0 = cosA

= > cos(90°) = cosA

= > 90° = A

Hence the angle between them should be of measure 90°.

Answer 2

Answer:

SOLUTION:-

➡ Let the angle between them be A.

⭐ Using triangle law of vector addition :-

=> 10 = √[8² + 6² + 2 ( 8 + 6 ) cosA]

=> 10² = 64 + 36 + 96 cosA

=> 100 = 100 + 96 cosA

=> 0 = 96 cosA

=> 90° = A

➡ Hence, the angle between them should be measure of 90°.

Explanation:

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