A Text Book of PHYSICS PART I : CLASS 11>Chapter 4 - Scalars and Vectors>EXERCISE>Q 35

HARD

11th West Bengal Board

IMPORTANT

Earn 100

Which of the following sets of concurrent forces may be in equilibrium?

64% studentsanswered this correctly

Important Questions on Scalars and Vectors

HARD

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 4 - Scalars and Vectors>EXERCISE>Q 36

At a given instant of time two particles are having the position vectors

4 \hat{i} - 4 \hat{j} + 7 \hat{k}

metre and

2 \hat{i} + 2 \hat{j} + 5 \hat{k}

metre respectively. If the velocity of the first particle be

0.4 \hat{i} {ms}^{- 1}

, the velocity of second particle in metre per second if they collide after

10 s

is

MEDIUM

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 4 - Scalars and Vectors>EXERCISE>Q 37

Vector which is perpendicular to

a \cos θ \hat{i} + b \sin θ \hat{j}

is

HARD

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 4 - Scalars and Vectors>EXERCISE>Q 38

If

\vec{A} \times \vec{B} = \vec{B} \times \vec{A},

then angle between

\vec{A}

and

\vec{B}

is

MEDIUM

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 4 - Scalars and Vectors>EXERCISE>Q 39

The position vector of a particle is

\vec{r} = (a \cos ω t) \hat{i} + (a \sin ω t) \hat{j}

. The velocity vector of the particle is

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 4 - Scalars and Vectors>EXERCISE>Q 40

Minimum number of unequal vectors which can give zero resultant are

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 4 - Scalars and Vectors>EXERCISE>Q 41

For two vectors

\vec{A}

and

\vec{B}

, we have

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

and

\vec{A} + 2 \vec{B}

is perpendicular to

A

. Then

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 4 - Scalars and Vectors>EXERCISE>Q 42

If

\vec{a}

and

\vec{b}

are two vectors then the value of

(\vec{a} + \vec{b}) \times (\vec{a} - \vec{b})

is

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 4 - Scalars and Vectors>EXERCISE>Q 43

A body was at rest. Four forces begin to act on it simultaneously. The forces are

{\vec{F}}_{1} = \hat{i} + \hat{k}, {\vec{F}}_{2} = 3 \hat{j} - 4 \hat{i}, {\vec{F}}_{3} = 2 \hat{j} + 3 \hat{k}, {\vec{F}}_{4} = 3 \hat{i}

. In which plane will the body move ?