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Why does an athlete run before taking a high jump?

Posted by Gagan Robin Singh 8 years, 1 month ago

1 answers

Varun Banda 8 years, 1 month ago

An athlete runs before jumping to gain momentum. Because it helps in jumping higher and longer because of inertia of motion gained due to the motion. When the athletes Jump they already have a forward motion that would be greater than that of a jump made from standing in one spot.

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how to manage time my ward understand the question but he take 10min to solve it it is good or any improvement he needs

Posted by Anjali Shaktawat 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Sachin Kumar 8 years, 1 month ago

He needs to practise regularly

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What is equilibrium of a rigid body? ????

Posted by J Mondal 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Kritika Trehan 8 years, 1 month ago

Static equilibrium for a rigid body: A body (or any part of it) which is currently stationary will remain stationary if the resultant force and resultant moment are zero for all the forces and couples applied on it. Newton 's 3rd law: Each action has a reaction equal in magnitude and opposite in direction.

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What is magnus reaction

Posted by Rakhi Bhandari 8 years, 1 month ago

CBSE > Class 11 > Physics

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Moment of inertia depends upon

Posted by Prince Sareen 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

J Mondal 8 years, 1 month ago

Mass of the body,it's shape and size ,distribution of mass about the axis of rotation and the position and orientation of the axis of rotation. ....???

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What are elastomers

Posted by Vidushi Raj 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Varun Banda 8 years, 1 month ago

An elastomer is a polymer with viscoelasticity (having both viscosity and elasticity) and very weak inter-molecular forces, generally having low Young's modulus and high failure strain compared with other materials.

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A mass 'm' is taken to a planet whose mass is =to half that of earth & radius is 4 times that of earth . Calculate the mass of the bodyl on this planet

Posted by Usum Saini 8 years, 1 month ago

CBSE > Class 11 > Physics

0 answers

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Dare to give answer object which has no mass but non- zero omentum Don't use google

Posted by Alone But Awesome 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

J Mondal 8 years, 1 month ago

Photon

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Three bodies a ring,a solid cylinder,and a solid sphere roll down the same inclined plane without slipping .they start from rest .the radii of the bodies are identical .which of the bodies reaches the ground with maximum velocity ?

Posted by Mohit Jain 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Abhijeet Singh 8 years, 1 month ago

Sphere

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Whai is physics

Posted by Dinesh Saroha 8 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Seema Chauhan 8 years, 1 month ago

Physics is nothing but simply the study of natural phoneomena

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Sachin Kumar 8 years, 1 month ago

Otherwise,physics is the study of scientificially matter,energy and It's interaction.officially that word comes from latin language which means 'nature'.

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Explain the fundamental force in nature

Posted by Shubham Patidar 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Dinesh Saroha 8 years, 1 month ago

There are 4 fundamental forces in nature :- 1. Gravitational force 2. Weak nuclear force 3. Strong nuclear force 4. Electromagnetic force

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If x=at^2 and y=bt^2 find dy/dx

Posted by Rohit Mirchandani 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Seema Chauhan 8 years, 1 month ago

dy/dx=d/dx ×bt² =2bt

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Describe the flow of fluid.

Posted by Himangni Sahu 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Ashish Soni 8 years, 1 month ago

The flow of fluid is depend upon their viscosity , Hydrogen bond present in the fluid , temperature and pressure .

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What is stress? Define it.

Posted by Himangni Sahu 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Naveen Sharma 8 years, 1 month ago

Stress is measured as the deforming force applied (F) per unit area (A). The SI unit of stress is N/m² or Pa.

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1.5t² + 5t - 84 =0 SOLVE IT

Posted by Sahiil Khan 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Seema Chauhan 8 years, 1 month ago

d/dt of (1.5t²+5t-84) 1.5×2t+5 =3t+5

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Triple point of body

Posted by Jana Jana 8 years, 1 month ago

CBSE > Class 11 > Physics

0 answers

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Is it necessary to take physics tution in classes 11 and 12 or i can do it by my self also? If not necessary then recommend me some ways so that i can enhance my physics knowledge

Posted by Saloni Jaiswal 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Sakshi Malik 8 years, 1 month ago

By doing practice of derivations and numericals

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What do you mean by angular momentum of rotational body? Define the angular momentum of the body in terms of linear momentum and distance of application of force from the axis of rotation

Posted by Saloni Jaiswal 8 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Ashish Soni 8 years, 1 month ago

Angular momentum is a vector product of Linear momentum and distance or displacement. The angular momentum of a rotational body means the product of mass and velocity of a body in circulatory motion. Rotation around a fixed axis is a special case of rotational motion. The fixed axis hypothesis excludes the possibility of an axis changing its orientation, and cannot describe such phenomena as wobbling or precession. According to Euler's rotation theorem, simultaneous rotation along a number of stationary axes at the same time is impossible. If two rotations are forced at the same time, a new axis of rotation will appear. This article assumes that the rotation is also stable, such that no torque is required to keep it going. The kinematics and dynamics of rotation around a fixed axis of a rigid body are mathematically much simpler than those for free rotation of a rigid body; they are entirely analogous to those of linear motion along a single fixed direction, which is not true for free rotation of a rigid body. The expressions for the kinetic energy of the object, and for the forces on the parts of the object, are also simpler for rotation around a fixed axis, than for general rotational motion.

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Write 4 fundamental forces in ascending order of their strength

Posted by Devansh Yadav 8 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Devansh Yadav 8 years, 1 month ago

Wrong

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Varun Banda 8 years, 1 month ago

1)Strong force.

2) electromagnetism.

3) weak force.

4)gravity.

Explanation: "•The strong interaction is very strong, but very short-ranged. It acts only over ranges of order 10 − 13 centimeters and is responsible for holding the nuclei of atoms together. It is basically attractive, but can be effectively repulsive in some circumstances. •

The electromagnetic force causes electric and magnetic effects such as the repulsion between like electrical charges or the interaction of bar magnets. It is long-ranged, but much weaker than the strong force. It can be attractive or repulsive, and acts only between pieces of matter carrying electrical charge. •

The weak force is responsible for radioactive decay and neutrino interactions. It has a very short range and, as its name indicates, it is very weak. •

The gravitational force is weak, but very long ranged. Furthermore, it is always attractive, and acts between any two pieces of matter in the Universe since mass is its source. "

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What is right hand screw rule

Posted by Vishwas Vishu 8 years, 1 month ago

CBSE > Class 11 > Physics