TestUstad

(1, 1, 1) . (2, 2, 2)

Correct answer: C. 6

  • A. 2
  • B. 4
  • C. 6
  • D. 8

Explanation

The dot product of two vectors is calculated by multiplying their corresponding components and then adding those products together.So, for the vectors (1, 1, 1) and (2, 2, 2), the dot product would be:Vectors are i+j+k and 2i+2j+2k(i+j+k).(2i+2j+2k) = (1x2) + (1x2) + (1x2) = 2 + 2 + 2 = 6

Written and checked by , contributorLast updated
Report an error

The more specific you are, the faster it gets fixed. A source beats an opinion.

Prefer email? [email protected]

About Force and Motion

Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.

Practise Force and Motion

1,416 free Force and Motion MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Start a free Force and Motion testAll Force and Motion MCQs

Discussion

Stuck on an option, or know a faster way to get there? Ask or explain it here.

No comments yet. Be the first to explain this one.

Exams that ask Physics questions like this

Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Lecturer Physics Test Physics80 MCQsSubject Specialist Physics Test Physics80 MCQsNET Physics60 MCQsNUMS Physics40 MCQsDUHS Physics36 MCQsETEA MDCAT Physics36 MCQsKMU Physics36 MCQsMDCAT Physics36 MCQsECAT Physics30 MCQsETEA Engineering Admission Test Physics30 MCQsGIKI Physics30 MCQsNED Physics30 MCQsPIEAS Physics30 MCQsPMD Physics25 MCQsBSN Entry Test Physics20 MCQsPAF Airman Physics15 MCQs

More Force and Motion questions

What is the angle made by the vector - i - 5j with x-axis?

Which of the following option(s) represent a vector quantity?

If magnitude of A, B and C is 12, 5 and 13 units respectively and A + B = C. What will be the angle between vectors A and B?

Rain is vertically down with the velocity of 30m/s, a wind blows from north to south direction with 10m/s then at what angle should the umbrella be held and in which direction.

Three books A, B, and C are placed on each other with A on top, B in mid, and C at bottom. If the weight of A is 2N, B is 5N and that of C is 4N, what is the total force being exerted on book B?

A balloon going upwards with a velocity 12m/s. It releases a packet when it is at a height of 65m from ground. How much time the packet will take to reach the ground if g=10m/s2.