CBSE > Class 11 > Physics | CBSE Board | Homework Help

As the word tells you False force. Where pseudo means False. This force has no origin. It come to play when there is a need for a turning (frictional) force i.e. static force it is because a vehicle cannot suddenly as we when ride it, from that moment there is disturbing force that force is inertia which will not allow you take turn properly due it's tendency to resist that's we need friction but the force which caused by inertia to resist to take turn is called 'PseudoForce'.

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Amar Kumar 8 years, 2 months ago

A fictitious force , called a pseudo force is an apparent force that acts on all masses whose motion is described using a non-inertial frame of reference, such as a rotating reference frame.

For example if the person inside the accelerating car is looking at the person standing at the bus stop, he finds that the person is accelerating with respect to the car, though no force is acting on it. Here, the concept of pseudo force is required to convert the non-inertial frame of reference to an equivalent inertial frame of reference.

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nth displacement of the particle,if n=2,u=m/s,a=4m/s

Posted by Rishabh Pandey 8 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

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Distance - time graph means and examples ????

Posted by Nameera Rahman 8 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Kuldeepsa Bhati 8 years, 2 months ago

Distance-time gives velocity and area under velocity -time graph gives distance

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Tushar Kharb 8 years, 2 months ago

Distance time graph represent the speed of an object. The velocity is it's speed in a particular direction

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A man walks 80m in 20 seconds, then turns back and walks 50 m towards the starting point in 30 seconds. Find his average speed and average velocity.

Posted by Naziya Shaikh 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

S Varun Raj 8 years, 2 months ago

Δv = 80+50 / 20+30 = 130 / 50 = 13/5 = 2.6 m/s Δv-> = 80-50 / 20-30 = 30 (-) / -10 (-) = -3 m/s The negative sign because of opposite direction.

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Radius of spherical ball is 4.32+-0.01cm. Calculate the percentage error to estimate measurement of volume of sphere.

Posted by Naziya Shaikh 8 years, 2 months ago

CBSE > Class 11 > Physics

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RAdius of spherical ball is 4.32+-0.01cm.calculate the percentage error to estimate measurem

Posted by Naziya Shaikh 8 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

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If 5 litres of benzene is in a breaker then it will weight more in summers or in winters???..... This question have an answer..

Posted by Himanshu Tiwari 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Nameera Rahman 8 years, 2 months ago

Benzene have more weight in winter than summer season ??

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Define the term impulse

Posted by Nameera Rahman 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Amar Kumar 8 years, 2 months ago

The term "impulse" is also used to refer to a fast-acting force or impact.Impulse is the change of momentum of an object when the object is acted upon by a force for an interval of time, you can use impulse to calculate the average impact force of a collision.

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State keleper' s law of planetary motion?

Posted by Nameera Rahman 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Amar Kumar 8 years, 2 months ago

Kepler’s three laws of planetary motion are stated as follows:

(1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci.

(2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.

(3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.

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Explain why steel is more elastic than rubber?

Posted by Nameera Rahman 8 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Amar Kumar 8 years, 2 months ago

Elasticity is the capability of an object to return to its former shape once a load inducing strain is removed. If you were to drop a steel ball on a very hard surface, it would probably bounce higher than that of rubber. If you drop it on a softer surface, because it would deform less, then the surface it is to bounce off will be the one deforming, so the bounce would be a function of the elasticity of the floor, not of the ball. A strand of silk is indeed stronger than a steel wire of the same diameter. The reason is that metal uses metallic bounds which is not as strong as the covalent bounds in a macro-molecule like the ones in silk. Young's Modulus of steel is more than young's modulus of rubber.So steel is more elastic.

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Sangithkannan Kannan 8 years, 2 months ago

As steel a metal shows the property of malleability and ductility but rubber is a non metal which is brittle in nature

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What is meant by weightlessness?????

Posted by Nameera Rahman 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Amar Kumar 8 years, 2 months ago

The phenomenon of "weightlessness" occurs when there is no force of support on your body. When your body is effectively in "free fall", accelerating downward at the acceleration of gravity, then you are not being supported.The term zero gravity is often used to describe such a condition.

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What is parabolic equations ?????and give one example

Posted by Nameera Rahman 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Amar Kumar 8 years, 2 months ago

A parabola is a graph of a quadratic function, y = x²,

Equation of Parabola :- The equation used is the standard equation that has the form (y - k)² = 4a(x - h)

where h and k are the x- and y-coordinates of the vertex of the parabola and a is a non zero real number (in this investigation we consider only cases with positive a).

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Is it is possible that a body is in rest but it has an acceleration

Posted by Nameera Rahman 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Amar Kumar 8 years, 2 months ago

It is possible that a body is in rest but it has an acceleration ,we can show it by following examples:-

1. When you through a ball upside and when it reaches the top it pauses for a moment. At this moment, the velocity is zero but the ball still has acceleration and that acceleration is due to acceleration due to gravity. Thus at the peak, the velocity is zero but the object is still accelerating.

2. Second example can be discussed in the case of pendulum. When a pendulum moves, and when it reaches the extreme positions its velocity is zero but its still accelerating due to gravity.

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What is pressure

Posted by Arnav Singh 8 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Anshika Choudhary 8 years, 2 months ago

Force/area

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Deeksha Vohra 8 years, 2 months ago

SI unit of pressure is Pascal ( pa )

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Deeksha Vohra 8 years, 2 months ago

Force exerted on surface per unit area

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Calculate the mean length, mean absolute error and the percentage error in the measurement of length if the readings are 3.11cm,3.13cm,3.14cm and 3.14cm.

Posted by Naziya Shaikh 8 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

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What is the nature of energy stored in a compressed spring ?obtained the expression for the same ?represent graphically conversation of energy in elastic spring?

Posted by Kshitiz Singh 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Tushar Kharb 8 years, 2 months ago

Your all questions is in refresher

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State and prove work energy theorem for constant force?

Posted by Kshitiz Singh 8 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Yaman Deshwar 5 years, 10 months ago

Work energy theorem

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Pnp Jain 8 years, 2 months ago

For constant force it can be derived as: V^2 - u^2 = 2as Dividing the equation by m/2 MV²/2-mu²/2=mas Change in kinetic energy=Fs=W

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Anshika Choudhary 8 years, 2 months ago

Sorry but I m unable to write this proof b/c it takes a lot of tym in typing....but this proof is given in ur book

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Give two points of difference between the elastic and inelastic collision .In an elastic collision of two bodies the quantities that do not change after the collision are the total kinetic energy /total linear momentum / Total energy of system of two bodies.

Posted by Kshitiz Singh 8 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Anshika Choudhary 8 years, 2 months ago

1.In elastic collision there is no loss of kinetic erg 2.Momentum is conserved 3.Mechanical erg not converted into heat ,light or sound erg. 1.In inelastic collision there is loss of k.e. 2Momentum is conserved. 3Mechanical erg is converted into heat ,light and sound erg.

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What is the angle between force of friction and velocity of a body moving on a rough surface?

Posted by Kshitiz Singh 8 years, 2 months ago

CBSE > Class 11 > Physics