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A man at the distance of 10 km away from airport on a straight road and a another man took her along a circular path 23km long and reached the hotel in 28minutes what was the average speed and magnitude of average velocity

Posted by Lakshmi Kanth 8 years, 2 months ago

CBSE > Class 11 > Physics

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Why the shape of projectile is parabola

Posted by Chanchal Singh 8 years, 2 months ago

CBSE > Class 11 > Physics

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How to derived kinetic energy theorem

Posted by Sanju Didel 8 years, 2 months ago

CBSE > Class 11 > Physics

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A body weight 60kg on the surface of the earth how much will it weighs on the surface of mass whose mass is 1 by 9 and radius is half that of the earth

Posted by Sudeep Pammar 8 years, 2 months ago

CBSE > Class 11 > Physics

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Can two opposite vector cancel??

Posted by Preeti Kothiyal 8 years, 2 months ago

CBSE > Class 11 > Physics

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How many of you are going to fail in physics in first term exam.....???????

Posted by Yo Yo Honey Singh ? 8 years, 2 months ago

CBSE > Class 11 > Physics

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Which stream have maximum job scope ??? Arts Science Commerce

Posted by Yo Yo Honey Singh ? 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Vinay Nara 8 years, 2 months ago

Commerce

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Two forces whose magnitude are in the ratio 3:5 give a resultant of 28n .if the angle of their inclination is 60°,find the magnitude of each force.

Posted by Bharat Rana 8 years, 2 months ago

CBSE > Class 11 > Physics

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Check by the method of dimensions whether the E=mc square equation is correct or not

Posted by Shivam Kumar 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Vivek Kumar 8 years, 2 months ago

LHS=Dimensions of energy : [M][L²]/[T²] RHS=mc² =[M]×[L/T]² =[M]×[L²]/[T]² =[M][L]²/[T]² Dimension of LHS=Dimension of RHS

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A lighter body and a heavy body have the same momentum which one has greater kinetic energy. Justify your answer mathematically.

Posted by Khushkiran Kaur Pandher 8 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Neha Yadav 8 years, 2 months ago

Sorry v2 will be greater.

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Neha Yadav 8 years, 2 months ago

Lighter body has greater kinetic energy. As p1=p2, M1v1=m2v2 This shows that product of momentum is same but it is showing that when m1 is greater , then v1 will be lower,so m2 lower then,v1 will be greater

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Why does a railway track have a particular shape like I

Posted by Iakamjot Singh 8 years, 2 months ago

CBSE > Class 11 > Physics

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🅿🅰🆆🅰🅽 . 7 years, 10 months ago

This is typical shape of the cross-section of a track laid with Flat-footed Rails. ... These are shaped so for following purposes: The top portion or the HEAD of the rail is thicker to take up the impact of the fast moving wheels, and carry the load of trains preventing abrasion of the tracks.

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What are conservative forces

Posted by Ayush Meena 8 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Dewank Singh 8 years, 2 months ago

In conservative force we need only path.

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Amar Kumar 8 years, 2 months ago

A conservative force is a force where the work done in moving a particle between two points is independent of the taken path. If a particle travels in a closed loop, the net work done (the sum of the force acting along the path multiplied by the displacement) by a conservative force is zero. A conservative force is dependent only on the position of the object.

Examples:gravitational force, spring force, magnetic force.

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in vertical circular motion if velocity at the lowermost point is 6rg where find the tension in the string where speed is minimum give the mass of the block atachedto it is m

Posted by Avinash Singh 8 years, 2 months ago

CBSE > Class 11 > Physics

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A bob is pulled sideway so that string become parallel to horizontal and released. Length of the pendulum is 2m. If due to air resistance loss of energy is 10% what is the speed with which the bob arrives the lowest point ?

Posted by Laxmi Singh 5 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Avinash Singh 8 years, 2 months ago

l=2m = h PE=mgh=2mg loss in E=10% now, PE=9/10x 2mgh PEat the highest pt.=KE at lowest point 9/10x 2mg=1/2x mv2 hence now calculate th value of v where g=10 ans 6

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Example of inertial and non inertial

Posted by Ranjan Singh 8 years, 2 months ago

CBSE > Class 11 > Physics

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What's the Conservative force

Posted by Dhilna Nv 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Priyanka Sharma 8 years, 2 months ago

Those forces which depend upon initial and final point , doesn't depend on path has been travelled

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what is law of inertia?

Posted by Ansh Shimar 8 years, 2 months ago

CBSE > Class 11 > Physics

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Is work done against gravity positive or negative?

Posted by Pakshita Sharma 8 years, 2 months ago

CBSE > Class 11 > Physics

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A small ball rolls off the top landing of staircase it strikes the mid point of the first step and then the mid point of second step the steps are smooth and identicle in height and width find the cofficient of restitution between the ball and first step is

Posted by Himanshu Gupta 8 years, 2 months ago

CBSE > Class 11 > Physics

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Is it necessary that the center of mass of a body should always lie inside the body?

Posted by Isha Deo 8 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Rahul Poddar 8 years, 2 months ago

No centre of mass of a body not always lies inside the body for example when you bent your upper body forward your center of mass shifts from inside the body in forward direction which implies com is not always lies inside body

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Gagan Robin Singh 8 years, 2 months ago

No it is not necessary .....it may lie outside of the body

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In a velocity time graph,what the area under acceleration and time defines?

Posted by As K 8 years, 2 months ago

CBSE > Class 11 > Physics