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New answer posted

10 months ago

0 Follower 3 Views

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Pallavi Pathak

Contributor-Level 10

When there is no normal force acting on a body, weightlessness is experienced, and the body free fall under gravity. The concept of gravity is still acting on the body, however, there is no weight sensation of any reaction force from any surface or ground. The weightlessness felt by the astronauts in an orbiting spacecraft is not because gravity is not present but because while they are moving forward, both, they and the spacecraft are in continuous free fall towards the Earth. The role of the normal force in defining weight can be understood from this phenomenon also how it is different from the actual gravitational force.

New answer posted

10 months ago

0 Follower 4 Views

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Pallavi Pathak

Contributor-Level 10

The gravitational pull of the Moon is the main reason behind the tides of Earth and it is less dependent on the sun. The gravitational pull of the moon on Earth is stronger than the sun's gravitational pull due to Earth's proximity to the moon. The Earth's oceans get pulled by the moon's gravity, which creates a bulge of water on the side of the Earth facing the moon. Also, another bulge gets created on the opposite side due to the water's inertia. When the earth rotates, its areas pass through these bulges which form the high and low tides. Each day, two high and two low tides are created by the gravitational interaction.

New answer posted

10 months ago

0 Follower 5 Views

P
Pallavi Pathak

Contributor-Level 10

When there is no normal force acting on a body, weightlessness is experienced, and the body free fall under gravity. The concept of gravity is still acting on the body, however, there is no weight sensation of any reaction force from any surface or ground. The weightlessness felt by the astronauts in an orbiting spacecraft is not because gravity is not present but because while they are moving forward, both, they and the spacecraft are in continuous free fall towards the Earth. The role of the normal force in defining weight can be understood from this phenomenon also how it is different from the actual gravitational force.

New answer posted

10 months ago

0 Follower 4 Views

P
Pallavi Pathak

Contributor-Level 10

To get the best results, students should begin their preparation by reading the NCERT chapter thoroughly, especially dimensional analysis, numerical problems involving significant figures, and errors. They need to practice questions first by not looking at the answers and after they complete their solutions, they can cross-check with the solutions given here, they need to make a list of formulas and units to revise regularly. Also, they should refer to other reference books for better practice.

New answer posted

10 months ago

1 Follower 82 Views

P
Pallavi Pathak

Contributor-Level 10

Yes, class 11 physics ch 1 notes clearly explain the limitations of measurement due to human error, instrumental errors and environmental conditions. The solutions show how no measurement is perfectly accurate by providing examples where measured values deviate from actual values. The chapter also shows how to improve precision and minimize errors. This helps students to understand that physics often expresses values with a degree of uncertainty as it involves approximations. By knowing how to handle and report these uncertainties, one can perform better in the experimental and theoretical assessments, and also get a realistic view of

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New answer posted

10 months ago

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Pallavi Pathak

Contributor-Level 10

The chapter 1 emphasize on the use of standard units (like meter, second, kilogram) and physical constants (like speed of light, Planck's constant) by incorporating them into numerical problems and derivations. These constants are important for solving Physics problems related to universal law and equations. The chapter helps students understand how and when to use the constants and convert them to different unit systems. This ensures consistency in problem-solving and builds confidence and familiarity when working with standardized values. Moreover, it reinforces the importance of using standard conventions in experimentation and scie

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10 months ago

0 Follower 43 Views

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Pallavi Pathak

Contributor-Level 10

The class 11 physics ch 1 notes cover all key topics including - Measurement of length, Measurement of mass, Measurement of time, Introduction to Units and Measurement, the international system of units, Dimensional formulae and dimensional equations, Dimensional analysis and its applications, Accuracy, precision of instruments and errors in measurement Significant figures, and Dimensions of physical quantities.
Each of these concepts is explained with clarity and in a structured manner. There are solutions to all NCERT questions in this chapter and also additional solved examples for better understanding and practice. The solutions hel

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10 months ago

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Pallavi Pathak

Contributor-Level 10

NCERT Solutions differentiates between base units (like meter, kilogram, second) and derived units (like Newton, Joule, Pascal). The fundamental quantities defined by the SI system are the base units and the combinations of these base units are called the derived units. NCERT solutions include a list of base and derived units and explain how derived units are formed while using base units. By practising NCERT solutions, the students learn to convert units and identify correct dimensional formulas for any physical quantity. Understanding of these concepts is crucial as all the chapters ahead will include these units, formulas and calcul

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New answer posted

10 months ago

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Pallavi Pathak

Contributor-Level 10

Yes, NCERT Solutions for Class 11 Physics Chapter 1 Units and Measurements offers a solid foundation for mastering the chapter for the entrance exams like NEET and JEE exams. Most of these competitive exams focus on application-based questions and conceptual clarity. If one prepares well from NCERT solutions, they have a better solution of scoring high in these exams. The solutions cover all the related important topics including error analysis, dimensional formulas, and SI units. Along with the NCERT solutions, the students should also refer to other books including HC Verma and previous years' papers. However, the primary source is t

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New answer posted

10 months ago

0 Follower 19 Views

P
Pallavi Pathak

Contributor-Level 10

The solutions offer a complete explanation of errors in measurement including relative, absolute and percentage errors. The solutions will tell students that while solving numerical questions and performing experiments how to calculate and combine different types of errors. In real-world Physics applications, error analysis is crucial where exact values are rarely obtained. The NCERT solutions of the units and measurements class 11 include examples to tell how to find the maximum possible error in a result derived from multiple measurements. This helps students to enhance their ability to interpret experimental results scientifically a

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