# Physics

posted by .

Three vectors, each have a magnitude of 30 units, have their tails at the same oint and are directed 120 degrees from each other. Make a statement concerning the sum of these three vectors.
a) the sum vector is 0
b) the sum vector is greater thatn 30
c) the sum vector is equal to 30
d) the sum vector is less than 30

c) would be the correct answer right? I did v=sqrt(v_x^2 +v_y^2) and got 29.9993 which is quite close to 30.

• Physics -

Do the math in polar:

a@0 + a@120 + a@240

Well, the y components of all three of those add to zero.

Now, the x components is a+ -2a*cos60
which is...

## Similar Questions

1. ### Physics

The two vectors a and b have equal magnitudes(on an x-y plane vector a is 30 degrees from the x axis then vector b is 75 degrees from the head of vector a it is heading towards north west) of 10m A)find the x component of their vector …
2. ### Physics

The three vectors have magnitude a =3m, b= 4m and c=10m . On the x axis is vector a at 0 degrees then 30 degrees is vector b then 120 degrees is vector c. If vector c =p*vector a + q*vector b .What are the values of p?
3. ### physics-vectors

If the magnitude of the sum of two vectors is greater than the magnitude of either vector, then: If the magnitude of the sum of two vectors is less than the magnitude of either vector, then: a. the scaler product of the vectors must …
4. ### Physics

1) The vector sum of three vectors gives a resultant equal to zero. what can you say about the vectors?
5. ### Science

1) The vector sum of three vectors gives a resultant equal to zero. what can you say about the vectors?
6. ### Physics

A golfer, putting on a green requires three strokes to “hole the ball.” During the first putt, the ball roles 5.0m due east. For the second putt, the ball travels 2.1m at an angle of 20 degrees north of east. The third putt is …
7. ### physics

The magnitude of vector A is 18 units at an angle of 90 degrees with the x-axis, and the magnitude of vector B is 12 units at an angle of 330 degrees with the x-axis. What vector C must be added to the vectors A and B so that the resultant …
8. ### Physics

Can you find two vectors with different lengths that have a vector sum of zero?
9. ### Physics

Can you find two vectors with different lengths that have a vector sum of zero?
10. ### PHYSICS

Vector A⃗ points in the negative x direction and has a magnitude of 22 units. The vector B⃗ points in the positive y direction. partA:Find the magnitude of B⃗ if A⃗ +B⃗ has a magnitude of 37 units. partB: Sketch A⃗ and …

More Similar Questions