Question

What is the magnitude of two vectors 10 and 5 units which make an angle of 120 with each other

super physicist ​

Answer 1

Answer:

5√3

Explanation:

Use the following formula for magnitude of resultant (R) of two vectors (A & B) making an angle ∅ with each other:

• R = √(A² + B² + 2ABCos∅)

R = √[10² + 5² + (2 × 10 × 5 × Cos120)]

= √[100 + 25 + (100 × -0.5)]

= √(125 - 50)

= √75

= 5√3