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a cricket ball of mass500g is moving with speed of 36km per hour it is a reflected back with the same velocity what is the impulse appliwd on it

Posted by Vikash Kumar 8 years, 3 months ago

CBSE > Class 11 > Physics

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What do you mean by radius of gyration

Posted by Viiv Viv 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Amar Kumar 8 years, 3 months ago

Radius of gyration or gyradius refers to distribution of the components of an object around an axis. In terms of [mass moment of inertia], it is the perpendicular distance from the axis of rotation to a point mass (of mass, m) that gives an equivalent inertia to the original object(s) (of mass, m).

Mathematically the radius of gyration is the root mean square distance of the object's parts from either its center of mass or a given axis, depending on the relevant application. It is actually the perpendicular distance from point mass to the axis of rotation.

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Define the law of parallelogram of vector.derive the expression for magnitude and direction of resultant vector R of two vector A and B inclined at angle theta

Posted by Sameer Khatri 8 years, 3 months ago

CBSE > Class 11 > Physics

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State abd explain the principle of superposition of gravitational forxe

Posted by Harman Kaur 8 years, 3 months ago

CBSE > Class 11 > Physics

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What is work energy thorem

Posted by Shadan Imami 8 years, 3 months ago

CBSE > Class 11 > Physics

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Rahul Poddar 8 years, 3 months ago

According to work energy theorem work is equal to change in energy it can be derived by calculus method by taking limit from u→v

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A spring requires 4J of work to be stretched through 10cm. Find the spring-constant.

Posted by Shiv Varma 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Vijay Arora 8 years, 3 months ago

Work=Force×displacement 4=Force×10/100 4=Force×0.1 4/0.1=Force 40Newton=Force. Spring constant(k) =F/x. (where x is stretched distance) k=40/0.1 k=400 ans.

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Define law of conservation of energy and prove it in case of free falling body

Posted by Pratham Mittal 8 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Shivam Dwivedi 8 years, 3 months ago

The law states that energy is conserved in a closes system. It can neither be created nor be destroyed but can change its form. In case of free fall potential energy get converted into kinetic energy. Additionally, it is accelerated in ratio 1:3:5:7:9....

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Vijay Arora 8 years, 3 months ago

According to law of conservation of energy, energy can neither be created nor be destroyed. It can only change its form.

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Two block of mass m1 and m2 are connected with a mass less string. These blocks are placed over a smooth surface of inclined plane at an angle of 30°. A Force of 75N is applied to pull these blocks. Calculate the acceleration of the blocks. Given m1=0.6 Kg and m2=0.4Kg.

Posted by Rayyan Ahmad 8 years, 3 months ago

CBSE > Class 11 > Physics

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Find the moment about the point i+2j-k of a force represented by 3i+k acting through the point 2i-j+3k

Posted by Sam Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

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SI unit of work?

Posted by Amandeep Jangu 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Riya Kashyap 8 years, 3 months ago

Joules

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can you add partical of all subjects of class 11?

Posted by Priyanka Jangid 8 years, 3 months ago

CBSE > Class 11 > Physics

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Questions paper

Posted by Preeti Yadav 8 years, 3 months ago

CBSE > Class 11 > Physics

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Show that the bomb dropped from a fighter plane has a parabolic trajectory.

Posted by Shresth Mathur 8 years, 3 months ago

CBSE > Class 11 > Physics

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A ball is dropped from building of height 45 m. Simultaneously another ball is thrown up with a speed of 40 m/s. Calculate the relative speed of the ball as a function of time.

Posted by Shresth Mathur 8 years, 3 months ago

CBSE > Class 11 > Physics

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A body is dropped from the top of a tower. During the last second of its motion it travels 16/25 th of the height of the tower. Calculate the height of the tower if g=10 m/s^2

Posted by Shresth Mathur 8 years, 3 months ago

CBSE > Class 11 > Physics

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Write the formula for centre of mass of oxygen atom located at r1 and r2 vectors distances from the origin

Posted by Ritik Chandel 8 years, 3 months ago

CBSE > Class 11 > Physics

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Tension is act on a pulley it go up or down or up up

Posted by Sri Ram 8 years, 3 months ago

CBSE > Class 11 > Physics

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The components of vector is

Posted by Vijay Kumar 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Annu Sehrawat 8 years, 3 months ago

IN PHYSICS, WHEN YOU BREAK A VECTORS INTO ITS PARTS THOSE PARTS ARE CALLED ITS COMPONENTS. FOR EXAMPLE :IN VECTOR (4,1) THE x-axis,(HORIZONTAL) COMPONENT IS 4 And y-axis COMPONENT IS 1.

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Why the garders are given 'I' shape?

Posted by Shubhanshi Shrivastava 8 years, 3 months ago

CBSE > Class 11 > Physics

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What is the dimension formula of Time???

Posted by Atif Ashraf 8 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Shivam Dwivedi 8 years, 3 months ago

[M°L°T']

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Lavanya S 8 years, 3 months ago

Dimensional formula of time is given by [T]

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A full vector can be defined as the no.of times its unit vector if a unit vector doesn't have unit how then the the unit of full vector will come.

Posted by Soma Das 8 years, 3 months ago

CBSE > Class 11 > Physics

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What is projectile ?

Posted by Swapnil Bhuriya 8 years, 3 months ago

CBSE > Class 11 > Physics

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Gurvinder Kaur 8 years, 3 months ago

A projectile is any object thrown into space (empty or not) by the exertion of a force. Although any object in motion through space (for example a thrown baseball) may be called a projectile, the term more commonly refers to a ranged weapon.

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An object is projected from top of tower with velocity 20m/s at an angle 37 degree about the horizontal height of the tower is 40 m. Find time taken by object to reach the ground

Posted by Ashish Kumar 8 years, 3 months ago

CBSE > Class 11 > Physics