MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Work Done as Dot Product

If A⃗ = 3 i...

Question

If $\to A = 3 i + 2 j - k$ and $\to B = 2 i + 4 j - 14 k$ , then angle between $\to A$ and $\to B$ is:-

A

0^{\circ}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

60^{\circ}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

90^{\circ}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

30^{\circ}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $90^{\circ}$
We find that dot product of vector A and vector B is 0.So the angle between them is 90 degree.

Suggest Corrections

thumbs-up

0

Similar questions

| \to a | = 2, | \to b | = 7

\to a \times \to b = 3^i + 2^j + 6^k

then the angle between

\to a

\to b

Q. Find a vector perpendicular to each of the vectors

\to a + \to b

\to a - \to b

\to a = \land i + \land j + \land k, \to b = \land i + 2 \land j + 3 \land k

.

\to a = i + j - k, \to b = i - j + k, \to c

is a vector perpendicular to

\to a

and coplanar with

\to a

\to b

\to c =

\to r \times \to b = \to c \times \to b & \to r, \to a = 0

\to a = 2 \land i + 3 \land j - \land k, \to b = 3 \land i - \land j - k, \to c = \land i + \land j + \land k

\to r

\to a

\to b

are vectors in space given by

\to a = \frac{^i - 2^j}{\sqrt{5}}

\to b = \frac{2^i +^j + 3^k}{\sqrt{14}}

, then find the value of

(2 \to a + \to b) \cdot [(\to a \times \to b) \times (\to a - 2 \to b)]

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

The Work Done as a Dot-Product

PHYSICS

Watch in App

explore_more_icon

Explore more

Work Done as Dot Product

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon