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Which book is the best of physics in class 11th

Posted by Alpna Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

3 answers

Bhawani Tanwar 8 years, 3 months ago

HC verma

Divya Kumari 8 years, 3 months ago

HC verma

Rajnish Kumar 8 years, 3 months ago

Sl simplfied for questions and concepts both

ANSWER

A 40 kg shell is flying at speed of 72 km/hr. It explodes into two pieces one piece of mass 15kg stops. Calculate velocity of other piece

Posted by Jaya Jain 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Sahdev Sharma 8 years, 3 months ago

Mass of the shell, M = 40 kg

Speed of the shell, u = 72 km/h = 20 m/s

Initial momentum of the shell, P_i = Mu = (40)(20) = 800 kg-m/s

After it breaks, the masses of the parts are 15 kg and 25 kg. The 15 kg piece stops. Let the speed of the other piece be ‘v’.

So, total momentum after breaking apart, P_f = (15)(0) + (25)(v) = 25v

Now, by law of conservation of momentum,

P_f = P_i

=> 25v = 800

=> v = {tex}800\over 25{/tex} = 32 m/s

This is the speed of the other piece.

ANSWER

Explain equilibrium

Posted by Shweta Jaiswar 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Harsh Rajput 8 years, 3 months ago

Kisi bhi point par jab net force 0 lagta h to usse equibrillium kahte h.

ANSWER

Can be speed of body negative?

Posted by Sachin Chauhan 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Shivaditya Pandey 8 years, 3 months ago

No.. Never can speed of a body be negative.

ANSWER

Differentiation of Sin²x??

Posted by Shivaditya Pandey 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Ankit Kumar 8 years, 3 months ago

2sinx.cosx

ANSWER

Define trajectory

Posted by Arnav Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Tarun Kumar 8 years, 3 months ago

Path of the projectile

ANSWER

A shell mass 0.020 kg is fired by a gun of mass 100 kg . If the muzzle speed is 80 m/ s what is the recoil of the gun

Posted by Sandeep Pandey 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Daily life examples of Newton's 3rd law of Motion

Posted by Aashish Kumar 8 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Swarnali Mondal 8 years, 3 months ago

Kicking of football

Bhawani Tanwar 8 years, 3 months ago

When we hit or punch a wall.

ANSWER

Rain is falling vertically with a speed of 35m/s wind started blowing after some time with a speed of 12m/s in East to West direction. In which direction should a boy waiting at a bus stop hold his umbrella

Posted by Kishan Kishan 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Where is the solutions for previous years papers in phy

Posted by Sneha Gore 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is physical world?

Posted by Siba Sethi 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Cal total kinetic energy and average kinetic energy of 32g CH4 at 27c also find root mean sqaure velocity of CH4

Posted by Jaisy Cheema 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Give examples of projectile motion?

Posted by Arnav Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Swarnali Mondal 8 years, 3 months ago

Bomb dropped from an aeroplane is an example of horizontal projectile. Javelin throwing is an example of oblique projectile.

ANSWER

Why is it difficult to walk on sand?

Posted by Ayush Bartwal 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Rudranshu Mishra 8 years, 3 months ago

It is difficult to walk on sand becoz when we push d sand with r feet it doesn't react back with d same force becoz d particles of sand r very loosely arranged therefore it gets spread..and can't generate d lift up which is needed by which we can move easily.

ANSWER

Why do vectors have magnitude.?

Posted by Vatan Kumar 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Why bones of person are fractured in accident

Posted by Shobhit Tripathi 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Amar Kumar 8 years, 3 months ago

In case of an accident, the high momentum of fast moving vehicle reduced to zero in a very short interval. Due to this a large force or impact is occured and it may be possible that we get an injury or bone may be broken.

ANSWER

3 persons are initially at the 3 corners of an equilateral triangle whose side is equal to d. Each person now moves with a uniform speed V in such a way that the first moves directly towards the second , the second moves directly towards the third, the third directly towards the first . The 3 person will meet after a time equal to:

Posted by Prakriti Verma 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Two vectors both equal in magnitude have their resultant equal in magnitude of either. Find the angle between the two vectors

Posted by Kasmita Dutta 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Sahdev Sharma 8 years, 3 months ago

Let {tex}\theta {/tex} be the angle between the two vectors A and B such that, |A| = |B|.

Therefore, {tex}R ^2 = A ^2 + B ^2 + 2AB cos\theta{/tex}

{tex}=> A^2 = A ^2 + A ^2 + 2AAcos\theta{/tex}

[{tex}\because {/tex} |A| = |B| = |R|]

{tex}=> A^ 2 = 2A^ 2 + 2A ^2 cos\theta {/tex}

{tex}=> cos\theta ={ -1\over 2}\\ => \theta = 120^°{/tex}

ANSWER

Fundamental unit

Posted by Shubham Kumar 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Arnav Singh 8 years, 3 months ago

The unit which does not depend upon another unit for its measurement is known as fundamental unit

ANSWER

show by making neat diagram in case of spring stressed or elongated

Posted by Shubham Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

draw a plot of spring force and displacement

Posted by Shubham Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

prove that coffiecient of restitution for one dimensional elastic collision equation

Posted by Shubham Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A hammer of mass 1.0 kg moving with a speed of 10m/s sticks the head of a nail of negligible mass and drives it in a block of wood by 10cm. Find A-acceleration during impact. B-time interval of impact. C-impulse.

Posted by Adarsh Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A small weighs 12 N resist on smooth incline plane at angle of 40 the block is held in equilibrium by force p find p when it is parallel to plane and when it is horizontal

Posted by Chhavi Sharma 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is resultant vector

Posted by Karthik Pajithkumar 8 years, 3 months ago

CBSE > Class 11 > Physics

3 answers

Pranav Choudhary 8 years, 3 months ago

R= P+Q

Pranav Choudhary 8 years, 3 months ago

When two vectors p and Q are added they give the the resultant vector

Pranav Choudhary 8 years, 3 months ago

R=root under a^2+b^2+cos thita

ANSWER

obtain the formula for work energy theorem by proving that incresing in kinetic energy is equal to work done on the body

Posted by Shubham Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

obtain relation between kinetic energy and linear momentum

Posted by Shubham Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Swarnali Mondal 8 years, 3 months ago

K. E. = 1/2 mv^2 Multiplying 2m on both the sides, we get 2mK.E =1/2mv^2×2m 2mK.E = m^2v^2 mv = root under 2mK.E.

ANSWER

Calculate the smallest radius of a circle on which a scooterist can turn if his speed is 36 km/hr and the coefficent of static friction between the tires and the road is 0.32.

Posted by Pranav Choudhary 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What do you Mean by force

Posted by Mission Sojitra 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Shubham Singh 8 years, 3 months ago

it is external force exerted by body on the object

ANSWER

If displacement x=kt3 find the dimension of the constant know.

Posted by Prince Patel 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Divya Kumari 8 years, 3 months ago

LT^-3

ANSWER

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