Vector Addition and Components Review

The pointed end of the vector is called the

• head

• tail

• the pointed end

The flat end of the vector is called the

• head

• tail

• the flat end

Where on a 2D vector is the angle found?

• At the head

• At the tail

• Whichever one I feel like using

Which of the following correctly describes how vectors should be drawn to add them together?

• Vectors should be drawn with tails touching. Resultant vector connects the heads

• Vectors should be drawn with tails touching the previous head. Resultant vector connects first tail to last head

• Vectors should be drawn with tails touching the previous head. Resultant vector connects last head to first tail

• None of these are correct

In order to answer a question asking you to find a 2 dimensional vector, what do you need to find?

• Just the length of the vector

• Just the angle of the vector

• Both the length of the vector and its angle

To find component vectors, which of the following could you use?

• sin

• cos

• pythagorean theorem

• all of these

In which of the following situations should you break a 2D vector into its component vectors?

• An object is launched at 15 m/s at a 20 degree angle. Find the range

• An object is launched horizontally at 5 m/s. Find the final velocity

• A man walks 30 km at a 25 degree angle. What is the horizontal component of his displacement?

• A wagon is being pulled with a force of 25 N at 10 degrees above the horizontal. What is the horizontal acceleration of the wagon?

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

If you want to find the angle of a 2D vector, which do you want to use?

• Regular trig functions

• Inverse trig functions

If you want to find the length of a component vector, which do you want to use?

• Regular trig functions

• Inverse trig functions

All vectors have (a)   . (3 words)