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The magnitude and direction of two vectors are shown in the diagram. What is the magnitude of their sum?

The magnitude and direction of two vectors are shown in the diagram. What is the magnitude-example-1
User Tim Rutter
by
5.2k points

2 Answers

6 votes

Answer:

2√5

Explanation:

User Kloarubeek
by
4.5k points
4 votes

Answer:

2√5

Explanation:

Using the formula for calculating resultant

R = √Fx + Fy

\sum Fx = -2sin 45 + 4 cos 45

\sum Fx = 2cos45

\sum Fx = 2(1/√2)

\sum Fx = 2/√2

Similarly;

\sum Fy = 2 cos 45 + 4 sin45

\sum Fx = 2(1/√2) + 4(1/√2)

\sum Fx = 6/√2

Magnitude = √(2/√2)²+6/√2)²

Magnitude = √4/2 + 36/2

Magnitude = √2+18

Magnitude = √20

Magnitude = 2√5

Hence the magnitude of their sum is 2√5

User Abdul Ahmad
by
4.7k points