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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 4901. |
Direction of cosines |
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| 4902. |
State law of conservation of energy |
| Answer» Law of conservation of energy states that the total energy of an isolated system in a given frame of reference remains constant—it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it transforms from one form to another.For instance, chemical energy can be converted to kinetic energy in the explosion of a stick of dynamite. In technical terms, conservation of energy can be rigorously proven by the Noether theorem to be a direct consequence of continuous time translation symmetry. | |
| 4903. |
Newton\'s second law of motion is real law of motion. Justify the statement ? |
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Answer» Newton\'s second law of motion is the real of motion because it only III and 1st law can be derived. It can be and it can not be It can be applied all questions expext PSEUDO FORCES |
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| 4904. |
What is the type of path followed by a body when it is dropped from a moving vehicle? |
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| 4905. |
Why are the wheels of a vehicle round in shape? |
| Answer» The circular shape of the tyre is the most suitable shape for faster rolling on the roads and also only point of contact between vehicle & the road.The circle shape is the shape that provides the least rolling resistance therefore it provides the least loss of energy when converting rotational energy to linear kinetic energy.Any shape other than a circle is going to present points that dig into the surface you are trying to traverse and require extra energy to undig.However the circle shape does dig into a surface so resistance caused by gravity does not have to be opposed. | |
| 4906. |
Sir give me all formulas of kinematics and also the trick to learn them |
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| 4907. |
Why it is easier to pull a lawnmower rather than pushing |
| Answer» it is because when we pull/push a lawn mower, we apply a force in the direction of its handle which is at an angle with the ground. So there is always a component of force normal to the ground.Thus when we pull, we reduce the net normal acting on the ground and thus reduce the frictional force and making it easier to pull, but when we push, we add to the normal force. | |
| 4908. |
At what height above the earth surface gravity becomes half |
| Answer» Variation in value of at higher altitude is given as,\xa0{tex}g_h = g\\left ( 1-{2h\\over R}\\right ){/tex}Here,gh is the value of acceleration due to gravity at height h above the surface of the Earth. Also, R is the radius of Earth.Using it in the relation, we get,\xa0{tex}{g\\over 2} = g\\left (1-{2h\\over r}\\right )\\\\=> {2h\\over R} = {1\\over 2}\\\\=> h = {R\\over 4}{/tex}Thus value of g will be its half at the height =\xa0{tex}{R\\over 4}{/tex}, above the surface of the Earth, where R is the Radius of Earth. | |
| 4909. |
Derive motion formula by integration method |
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| 4910. |
What ls force |
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Answer» Force is a push and pull of an object. Force is an external agency in the form of pull or push between two bodies.it can change direction of a body ,can stop from motion to rest or vice versa or change in direction. |
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| 4911. |
collision |
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Answer» A collision is an isolated event in which two or more colliding bodies exert relatively strong forces on each other for a relatively short time Collision is said when two or more objects come in contact to each other and get deflected but if an object doesn\'t come with contact of another object but changes its path because of the another object then here also collision occurs . eg. Alpha particles diffraction through gold foil . Collision ? is said to occur when two objects is crashes with each other |
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| 4912. |
What is the projectile motion? |
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| 4913. |
Give reason:Why is friction called a necessary evil ? |
| Answer» Because it spoils the spareparts of the vehicles it also spoils the brakes of the vehicles , it also spoils our shoes because due to friction the sole of our shoes get spoiled . | |
| 4914. |
What are non-conservative forces |
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Answer» A force is said to be non-conservative,if work done by or against the force in moving a body from one position to another,depend on the path followed between initial and final positions. The type of force which depends upon the path followed and not on the initial and final positions. Eg. Friction Force. |
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| 4915. |
What is elastic and inelastic collision ? |
| Answer» Elastic Collison :-A Collison in which no loss of kinetic energy is called elastic Collison Inelastic Collison :-A collison in which some loss of kinetic energy is called inelastic collison | |
| 4916. |
How can we know a quantity is scalar or vector?what is the simplest way to recognise it? |
| Answer» The quantitity has its direction so it is a vector quantity otherwise it has no direction so it is a scaler quantity | |
| 4917. |
A force=2t acts on a particle of mass=2 kg.Find the work done by the force in first three seconds. |
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| 4918. |
What is analogy? |
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| 4919. |
What is the si unit of inertia |
| Answer» The amount of torque needed to cause any given angular acceleration (the rate of change in angular velocity) is proportional to the moment of inertia of the body. Moment of inertia may be expressed in units of kilogram metre square (kg. m2) in SI unit. | |
| 4920. |
Please give me half yearly question of2017 |
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| 4921. |
TydhjkhfghgRhjgfhjhrghhyGhfhhhdfgggfhhghhgggTuryrtyyduGhfhhhdfgggfhhghhggg |
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| 4922. |
What is connected motion prove it |
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| 4923. |
Where is center of mass between two bodies |
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| 4924. |
Formula of cross product of two vectors? |
| Answer» Vector A ×vector B =|vector A| |vector B| sin theta where theta is angle between vector A and vector B | |
| 4925. |
Define Kinematics |
| Answer» It is the branch of physics which deals with the study of particle which is in motin without any objection. | |
| 4926. |
Explain equilibrium |
| Answer» Kisi bhi point par jab net force 0 lagta h to usse equibrillium kahte h. | |
| 4927. |
Can be speed of body negative? |
| Answer» No.. Never can speed of a body be negative. | |
| 4928. |
Differentiation of Sin²x?? |
| Answer» 2sinx.cosx | |
| 4929. |
Daily life examples of Newton\'s 3rd law of Motion |
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Answer» Kicking of football When we hit or punch a wall. |
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| 4930. |
Where is the solutions for previous years papers in phy |
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| 4931. |
Why do vectors have magnitude.? |
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| 4932. |
Fundamental unit |
| Answer» The unit which does not depend upon another unit for its measurement is known as fundamental unit | |
| 4933. |
prove that coffiecient of restitution for one dimensional elastic collision equation |
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| 4934. |
What is resultant vector |
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Answer» R= P+Q When two vectors p and Q are added they give the the resultant vector R=root under a^2+b^2+cos thita |
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| 4935. |
obtain relation between kinetic energy and linear momentum |
| Answer» K. E. = 1/2 mv^2 Multiplying 2m on both the sides, we get2mK.E =1/2mv^2×2m2mK.E = m^2v^2mv = root under 2mK.E. | |
| 4936. |
What will be acceleration if speed is maximum |
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| 4937. |
Please give me the explanation for the 3laws of motion |
| Answer» v=u+ats=ut+1/2at^2v^2=u^2-2asU can prove by dimensional analysis also. | |
| 4938. |
Please explain the example no 4.5 i cant understand the 2nd part of this question |
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| 4939. |
What is sudo force or centrifugal force |
| Answer» Pseudo Force and centrifugal force are two different terms. Pseudo force is only a mathematical technique which is used in solving numericals whereas centrifugal force is the force, arising from the body\'s inertia, which appears to act on a body moving in a circular path and is directed away from the centre around which the body is moving. | |
| 4940. |
What is centre of mass |
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| 4941. |
Whebn does a vector produces zero magnitude. |
| Answer» Vector produce zero vector when the vector is null vector | |
| 4942. |
What is non conservative force |
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| 4943. |
Work done by variable force |
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| 4944. |
Find the number of seconds in 1 year . Express them in order of magnitude |
| Answer» 365.25 days × 86400 sec = 3.156 × 10^7 s | |
| 4945. |
Concept of projectile motion in easy language |
| Answer» If an object is thrown at any angle and some initial velocity this curve path known as projectile path and this type of motion is known as projectile motion | |
| 4946. |
Defination for scaler |
| Answer» Scaler quantity is the quantity which has only magnitude no direction | |
| 4947. |
Find the dimensions of work |
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Answer» Work=force*displacement =[MLT^-2]*[M^0 L^1 T^0] =[ML^2T^-2] Work= f.s (Force*Displacement) =[MLT-²] [L] =[ML²T-²] |
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| 4948. |
What is the meaning of word momentum |
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Answer» It is the product of mass and velocity According to Gallilio linear momentum is defined as motion contained inside a body. |
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| 4949. |
Write the si unit and linear momentum |
| Answer» Linear momentum is the product of mass and velocity ofan object. SI unit - kgm/s or N-s | |
| 4950. |
Define metre |
| Answer» Meter is a distance travelled by light in vaccum in 1/300000000 (approx.) Of a second... | |