Three vectors A → , B → and c → add up to zero. Find which is false.

( A → × B → ) . C → is not zero unless B → , C → are parallel.

( A → × B → ) × C → is not zero unless B → and C → are parallel.

If A → , B → , C → define a place, ( A → × B → ) × C → is in that plane.

( A → × B → ) · C → = | A → | | B → | C → | → C 2 = A 2 + B 2

It is found that | A → + B → | = | A → | . this necessarily implies

A → , B → are anti-parallel

A → , B → are perpendicular

For two vectors A → and B → , | A → + B → | = | A → - B → | is always true when

When either | A → | or | B → | is zero.

| A → | = | B → | ≠ 0 and A → and B → are parallel or antiparallel

E M B I B E

NCERT Exemplar Physics - Class 11>Chapter 4 - Motion in a Plane>MCQ-I>Q 4.7

EASY

11th CBSE

IMPORTANT

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In a two dimensional motion, instantaneous speed $v_{0}$ is positive, constant. Then which of the following are necessarily true?

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Important Questions on Motion in a Plane

EASY

11th CBSE

IMPORTANT

NCERT Exemplar Physics - Class 11>Chapter 4 - Motion in a Plane>MCQ-I>Q 4.8

In a two-dimensional motion, instantaneous speed

v_{0}

is positive and constant. Then which of the following are necessarily true?

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IMPORTANT

NCERT Exemplar Physics - Class 11>Chapter 4 - Motion in a Plane>MCQ-I>Q 4.9

Three vectors

\vec{A}, \vec{B}

and

\vec{c}

add up to zero. Find which is false.

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Physics - Class 11>Chapter 4 - Motion in a Plane>MCQ-I>Q 4.10

It is found that

| \vec{A} + \vec{B} | = | \vec{A} |

. this necessarily implies

EASY

11th CBSE

IMPORTANT

NCERT Exemplar Physics - Class 11>Chapter 4 - Motion in a Plane>MCQ-II>Q 4.11

Two particles are projected in air with speed

v_{0}

at angles

θ_{1}

and

θ_{2}

, (both acute) to the horizontal, respectively. If the height reached by the first particle is greater than of the second, then tick the right choices

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Physics - Class 11>Chapter 4 - Motion in a Plane>MCQ-II>Q 4.12

A particle slides down a frictionless parabolic $(y = x^{2})$ track $(A - B - C)$ starting from rest at point $A$ as in figure. Point $B$ is at the vertex of parabola and point $C$ is at a height less than that of point $A$ . After $C$ , the particle moves freely in air as a projectile. If the particle reaches highest point at $P$ , then

Question Image

.

EASY

11th CBSE

IMPORTANT

NCERT Exemplar Physics - Class 11>Chapter 4 - Motion in a Plane>MCQ-II>Q 4.13

Following are four different relations about displacement, velocity and acceleration for the motion of a particle in general. Choose the incorrect one(s).

EASY

11th CBSE

IMPORTANT

NCERT Exemplar Physics - Class 11>Chapter 4 - Motion in a Plane>MCQ-II>Q 4.14

For a particle performing uniform circular motion, choose the correct statement(s) from the following:

EASY

11th CBSE

IMPORTANT

NCERT Exemplar Physics - Class 11>Chapter 4 - Motion in a Plane>MCQ-II>Q 4.15

For two vectors