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All in one series is also good for a average student it explains every concept clearly and have many important questions in it, especially for physics has the book have good many questions.

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Mr Abir Singh 4 years, 3 months ago

Hii vaibhav (AVII) here

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Nayanika Mallick 4 years, 4 months ago

"S.L Aurora" is best for physics in class 11

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Chandani Maurya 4 years, 4 months ago

oswal puplication book of physics

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2 vectors P and q has a sum of 18 and resultant is 12 the smaller of 2 vectors find the value of P and q and angle between them Plz give me correct answer

Posted by Nyra Sharma 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Mayank Dadhich 4 years, 4 months ago

Vectors are 5 and 13

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555W=........ergs-1 formula by dimensional analysis

Posted by Vatsal Lad 4 years, 4 months ago

CBSE > Class 11 > Physics

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2 vectors P and Q has a sum of 18 and resultant is 12 resultant is perpendicular to smaller of 2 vectors find the value p and q and angle between them

Posted by Yash Sharma 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Gaurav Seth 4 years, 4 months ago

given that,

Two vectors p and q are the sum of 18 and resultant is 12

here,

we have,

sum of magnitude of vector = 18

so,

p + q = 18 ... (1)

and sum of both vectors I. e. resultant = 12

so,

p^-> + q^-> = 12 = R

Now,

ACCORDING TO THE FIGURE,

R² = p² + q² + 2pq cosθ

given R = 12

so,

12² = p² + q² + 2pq cosθ .... (2)

now,

here, since the resultant is perpendicular

so,

value of α = 90°

so,

tanα =

so,

tan90.=

so,

p + qcosθ = 0

qcosθ = -p

now,

putting the value of qcosθ on (2)

12² = p² + q² + 2pqcosθ

144 = p² + q² + 2p(-p)

144 = p² + q² - 2p²

q² - p² = = 144

using algebraic identity

a² - b² = (a + b)(a - b)

so,

(q + p)(q - p) = 144

now

from eqn (1)

p + q = 18

putting the values,

18(q - p) = 144

q - p = 144/18

q - p = 8 .....(3)

now,

we have,

q + p = 18 ..(1)

q - p = 8 ...(3)

adding of both equations

q + p + q - p = 18 + 8

2q = 26

q = 26/2

q = 13

now,

putting the value of q in (1)

p + q = 18

p + 13 = 18

p = 18 - 13

p = 5

q = 13

now,

putting the value of p and q on (2)

p² + q² + 2pqcosθ = 144

(5)² + (13)³ + 2(5)(13)cosθ = 144

25 + 169 + 130cosθ = 144

194 + 130cosθ = 144

130cosθ = 144 - 194

130cosθ = -50

cosθ = -50/130

cosθ = -5/13

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ANSWER

What is dynamics

Posted by Shashi Kumar Suman 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 4 years, 4 months ago

Dynamics, branch of physical science and subdivision of mechanics that is concerned with the motion of material objects in relation to the physical factors that affect them: force, mass, momentum, energy.

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S=t²-4 find displacement 1st, 3rd, 4th second

Posted by Nyra Sharma 4 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Anushka ?? 4 years, 4 months ago

Hlo

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Gaurav Seth 4 years, 4 months ago

▶ Given : x = (t - 2)

At t = 0 : x = xo = (0-2)^2 = 4m

At t = 1s : x = x1 = (1-2)^2 = 1m

At t = 2s : x = x2 = (2-2)^2 = 0m

At t = 3s : x = x3 = (3-2)^2 = 1m

At t = 4s : x = x4 = (4-2)^2 = 4m

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How many numbers of significant figures are in 0.007m square ?

Posted by Harkomal Pannu 4 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Υτкạяѕн Ѕнυкạl 4 years, 4 months ago

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Aanaya Sharma 4 years, 4 months ago

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Yogita Ingle 4 years, 4 months ago

The given quantity is 0.007 m².

If the number is less than one, then all zeros on the right of the decimal point (but left to the first non-zero) are insignificant. This means that here, two zeros after the decimal are not significant. Hence, only 7 is a significant figure in this quantity.

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State all vector quantities (like velocity, etc...) which are used in in class 11th physics?

Posted by Honey Yadav 4 years, 4 months ago

CBSE > Class 11 > Physics