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Find the area under acceleration time , and velocity time graph

Posted by P. Kabhil 6 years, 4 months ago

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Two identical balls are simultaneously thrown each other from point p and q horizontally separated by 8m and situated at heights 4m and 8m above the ground. One ball is thrown from p horizontally with a speed of 8 ms-1 while the other is thrown downward with a initial speed of v at an angle of 45 to horizontal. The two balls collide in space calculate the initial speed of ball and coordinate of the point of collision

Posted by Sangram Sandhu 6 years, 4 months ago

CBSE > Class 11 > Physics

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What is calorimetry

Posted by Shubham Kumar 6 years, 4 months ago

CBSE > Class 11 > Physics

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Difference between mass and weight

Posted by Mohammed Azhar Uddin 6 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Prince Attri 6 years, 4 months ago

Simple. .. masss is remain constant in every place or condition. .but weight is addition of maass + gravity. It change according to place .

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Gaurav Seth 6 years, 4 months ago

<th>BASIS FOR COMPARISON</th> <th>MASS</th> <th>WEIGHT</th>

Meaning	Mass refers to the quantity of matter contained in a body.	Weight implies the force acted upon the object due to the pull of gravity.
What is it?	It is the measure of inertia.	It is the measure of force.
Location	It remains same, irrespective of the location.	It varies as per the location.
Physical Quantity	Scalar Quantity	Vector Quantity
Zero	It can never be zero.	When no gravity acts upon the body, it can be zero.
SI unit	Kilogram	Newtons
Measurement	Ordinary balance is used in measurement.	Spring balance is used in measurement.

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Varsha Bhati 6 years, 4 months ago

Mass of a body is defined as the quantity of matter in the body, which can never be 0 Weight weight is the force exerted by gravity on an object

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Derive an expression for gravitational potential energy of an object?

Posted by Gautam Kumar 6 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Gaurav Seth 6 years, 4 months ago

We know that every object on the surface of the Earth is attracted by the Earth.So,if an object has a mass'm',it will experience a force that is called the weight of the object which acts vertically downwards.

To move this object upward from 'a' to'b' through a distance 'h', we must apply a force 'f' upward were F=Mg

W=Fh, but as F=Mg,

W=mgh -------(1)

This work done on the object which changes its position is called the Gravitational Potential Energy. Then:

Ep=w-------(2)

From (1) & (2), we get:

Ep=mgh

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At what angle projectile cover maximum distance? (1marks) SC DAV QUESTION

Posted by Durgesh Kumar 6 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Mahendar Sharma 6 years, 4 months ago

At 45 degree

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Chirag Chaudhary 6 years, 4 months ago

At the angle of 45 degree projectile will cover the maximum distance. Hope it will helps.

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Unit vector

Posted by Nishant Shukla 6 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Sia ? 6 years, 4 months ago

Unit vector is a vector which has a magnitude of one.

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Khushi Hamber 6 years, 4 months ago

Vector in which magnitude is one and shows direction is called as unit vector.

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What is principle of homogeneity

Posted by Garima Sharma 6 years, 4 months ago

CBSE > Class 11 > Physics

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Varsha Bhati 6 years, 4 months ago

Only that formula is correct,in which the dimensions of the various terms on one side of the relation are equal to the respective dimensions of these terms on the other side of the relation

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Ayush Vishwakarma?? 6 years, 4 months ago

Principle of homogeneity is said that same physical quantity or same dimensional formula are add or subtracted between two quantities.

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Garima Sharma 6 years, 4 months ago

Thanks but i can't understand what do u mean by this can u explain for this

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Gautam Verma 6 years, 4 months ago

When we add or subtract quantities then it is same quantity

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Two balls are thrown at the same time, A ball is vertically upward with speed 20ms-1from the ground and ball B is vertically downward fron a height of 40m with same speed at what point do the balls collite(meat) ?

Posted by Sonu Kumar 6 years, 4 months ago

CBSE > Class 11 > Physics

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3.26q ch 3 class 11

Posted by Jolly Jolly 6 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Abhishek Kumar 6 years, 4 months ago

1/root2

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What is Spin force

Posted by Ranvijay Singh 6 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 6 years, 4 months ago

Spin is an intrinsic form of angular momentum

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What is physics.? .

Posted by Kabil Ahmed Choudhury 6 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Kabil Ahmed Choudhury 6 years, 4 months ago

Thanks ??

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Nishant Shukla 6 years, 4 months ago

Study of nature is called physics

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Sonu Kumar 6 years, 4 months ago

Physics is the main discipline part of science that deals withthe study of laws of nature and their application to natural phenomenon.

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Formula for percent tage error

Posted by Pallavi Mahato 6 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Prince Attri 6 years, 4 months ago

Mean error divided by mean constant × 100

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Ayush Vishwakarma?? 6 years, 4 months ago

100×error both side.

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Rock ×Himanshu 6 years, 4 months ago

Relative error*100

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Two resistors of resistances R1=100+-3ohm and R2=200+-4ohm are connected (a) in series, (b) in parallel.Find the equivalent resistance of the (a) series combination, (b) parallel combination.Use for (a) the relation R1=R1+R2 and for (b) 1/R'=1/R1+1/R2 and ∆R'/R'2=∆R1/R1^2+∆R2/R2^2

Posted by Yakub Saiyed 6 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 6 years, 4 months ago

Here, R₁ = (100 ± 3) {tex}\Omega{/tex}, R₂ = (200 ± 4) {tex}\Omega{/tex}

Resistance in Series combination
R = R₁ + R₂ = 100 + 200 = 300 {tex}\Omega{/tex}
{tex}\Delta{/tex}R = ± ({tex}\Delta R _ { 1 } + \Delta R _ { 2 } {/tex})
= ±(3 + 4) = ± 7 {tex}\Omega{/tex}
{tex}\therefore \quad R = ( 300 \pm 7 ) \Omega{/tex}
Resistance in Parallel Combination
{tex}\frac { 1 } { R ^ { \prime } } = \frac { 1 } { R _ { 1 } } + \frac { 1 } { R _ { 2 } } = \frac { R_2 + R_1 } { R_1 R_2 } = \frac{200+100}{100 \times 200}{/tex}{tex} = \frac { 300} { 20000 } = \frac { 3 } { 200 }{/tex}
{tex}R ^ { \prime } = \frac { 200 } { 3 } {/tex}= 66.66667 {tex}= 66.7 \Omega{/tex} [ upto one decimal place]
{tex}\frac { \Delta R ^ { \prime } } { R ^ { \prime 2 } } = \pm \left[\frac { \Delta R _ { 1 } } { R _ { 1 } ^ { 2 } } + \frac { \Delta R _ { 2 } } { R _ { 2 } ^ { 2 } }\right]{/tex}
{tex}\Delta R ^ { \prime } = \pm \left[\Delta R _ { 1 } \left( \frac { R ^ { \prime } } { R _ { 1 } } \right) ^ { 2 } + \Delta R _ { 2 } \left( \frac { R ^ { \prime } } { R _ { 2 } } \right) ^ { 2 }\right]{/tex}
{tex}= \pm \left[3 \left( \frac { 200 } { 3 \times 100 } \right) ^ { 2 } + 4 \left( \frac { 200 } { 3 \times 200 } \right) ^ { 2 } \right]{/tex}{tex}= \pm \left[3 \left( \frac { 4 } { 9 } \right) + 4 \left( \frac { 1 } { 3 } \right) \right]{/tex}{tex}= \pm 1.8 \ \Omega{/tex}
Hence, R' = ( 66.7 ± 1.8 ) {tex}\Omega{/tex}

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two cars p and q starts from a point a at the same time in a straight line and their position that presented by xp (t)=at+bt^2 and xq (t)= ft-t^2. At what time do the car have the same velocity?

Posted by Arockiaraj Chinnappan 6 years, 4 months ago

CBSE > Class 11 > Physics

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A marks man wishes to hit a target just in the same level of the line of sight .how sight , how high from the target .if the he should aim distance is 1600ms . and mudles speed of gun is 800 ms . ( take g=9.8)

Posted by Gurkaran Randhawa 6 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Gurkaran Randhawa 6 years, 4 months ago

We know that , vx= 800ms R, distance = 1600ms R= vx ×t 1600 = 800 ×t 1600÷ 800= t T =2sec Now apply t=under root of 2h÷ g Now , 2^=2× h÷9.8 4×98÷10× 2=h By cutting , 196÷ 10 So , height = 19.6 m

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What is the difference between plane n solid angle

Posted by Arockiaraj Chinnappan 6 years, 4 months ago

CBSE > Class 11 > Physics