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Daily Practice Problems
Class 11 Physics
Gravitation
daily practice problem

Question 1.

 

What is the escape speed for an object from the surface of the earth?

 

Question 2.

 

What is Newton’s law of gravitation?

 

Question 3.

 

State Kepler’s law of planetary motion.

 

Question 4.

What is the acceleration due to gravity below the surface of the earth?

 

Question 5.

 

What is the acceleration due to gravity above the surface of the earth?

 

Question 6.

 

Suppose there existed a planet that went around the Sun thrice as fast as the earth. What would be its orbital size as compared to that of the earth?

 

Question 7.

 

A rocket is fired vertically with a speed of 3 km-s-1 from the earth’s surface. How far from the earth does the rocket go before returning to the earth? Mass of the earth = 6.0 × 1024 kg; mean radius of the earth = 6.4 × 106 m; G = 6.67 × 10–11 N-m2kg–2.

 

Question 8.

Assuming the earth to be a sphere of uniform mass density, how much would a body weigh half way down to the centre of the earth if it weighed 500 N on the surface?

 

Question 9.

 

A spaceship is stationed on Mars. How much energy must be expended on the spaceship to launch it out of the solar system? Mass of the space ship = 1500 kg; mass of the sun = 2×1030 kg; mass of mars = 6.4×1023 kg; radius of mars = 3395 km; radius of the orbit of mars = 2.28 ×108 km; G = 6.67×10-11 N m2 kg–2.

 

Question 10.

 

A star 2.0 times the mass of the sun and collapsed to a size of 15 km rotates with a speed of 1.5 rev. per second. (Extremely compact stars of this kind are known as neutron stars. Certain stellar objects called pulsars belong to this category). Will an object placed on its equator remain stuck to its surface due to gravity? (Mass of the sun = 2×1030 kg).

 

Question 11.

 

Two heavy spheres each of mass 200 kg and radius 0.15 m are placed 1.5 m apart on a horizontal table. What is the gravitational force and potential at the mid-point of the line joining the centres of the spheres? Is an object placed at that point in equilibrium? If so, is the equilibrium stable or unstable?

 

Question 12.

 

A body weighs 90 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth?

 

Question 13.

 

What is the gravitational potential energy associated with two particles separated by a distance r?

 

Question 14.

 

What is the total energy of the system, if m moves in a circular orbit of radius r about M?

 

Question 15.

 

What is the total mechanical energy of the particle, If an isolated system consists of a particle of mass m moving with a speed v in the vicinity of a massive body of mass M?

 

Question 16.

 

How do you relate the period T and radius R of the circular orbit of a planet about the Sun?

 

Question 17.

 

What is the resultant gravitational force acting on the particle m due to a number of masses M1, M2……...Mn etc?

 

Question 18.

 

A 300 kg satellite is in a circular orbit of radius 2RE about the Earth. How much energy is required to transfer it to a circular orbit of radius 4RE? What are the changes in the kinetic and potential energies?

 

Question 19.

 

What is the total energy of an orbiting satellite?

 

Question 20.

 

A body weighs 50 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth?

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Problem-solving on Class 11 Physics Gravitation NCERT Chapter 7 after learning a theoretical concept is crucial for several reasons:

  1. Application of Knowledge: Problem-solving allows you to apply the theoretical concepts of the topic Class 11 Physics Gravitation you have learned to real-life situations. It helps you bridge the gap between abstract knowledge and practical scenarios, making the learning more relevant and meaningful.
  2. Understanding Deeper Concepts: When you encounter problems related to a theoretical concept that you learned in Class 11 Physics Gravitation NCERT Chapter 7, you are forced to delve deeper into its intricacies. This deeper understanding enhances your comprehension of the subject and strengthens your grasp of the underlying principles.
  3. Critical Thinking: Problem-solving encourages critical thinking and analytical skills. It requires you to analyze the problem, identify relevant information, and devise a logical solution. This process sharpens your mind and improves your ability to approach complex challenges effectively.
  4. Retention and Recall: Actively engaging in problem-solving reinforces your memory and improves long-term retention. Applying the concepts learned in Gravitation Class 11 Physics in practical scenarios helps you remember them better than passive reading or memorization.
  5. Identifying Knowledge Gaps: When you attempt to solve problems, you may encounter areas where your understanding is lacking. These knowledge gaps become evident during problem-solving, and you can then focus on filling those gaps through further study and practice. You can refer Gravitation Class 11 Physics Notes on LearnoHub.com
  6. Boosting Confidence: Successfully solving problems after learning a theoretical concept boosts your confidence in your abilities to handle Gravitation. This confidence motivates you to tackle more challenging tasks and improves your overall performance in the subject.
  7. Preparation for Exams and Challenges: Many exams, especially in science, mathematics, and engineering, involve problem-solving tasks. Regular practice in problem-solving prepares you to face these exams with confidence and perform well. It is also advised to take tests on Gravitation Class 11 Physics Online Tests at LearnoHub.com.
  8. Enhancing Creativity: Problem-solving often requires thinking outside the box and exploring various approaches. This fosters creativity and innovation, enabling you to come up with novel solutions to different problems.
  9. Life Skills Development: Problem-solving is a valuable life skill that extends beyond academics. It equips you with the ability to tackle various challenges you may encounter in personal and professional life.
  10. Improving Decision Making: Problem-solving involves making decisions based on available information and logical reasoning. Practicing problem-solving enhances your decision-making skills, making you more effective in making informed choices.

In summary, problem-solving after learning a theoretical concept on CBSE Gravitation Class 11 Physics is an essential part of the learning process. It enhances your understanding, critical thinking abilities, and retention of knowledge. Moreover, it equips you with valuable skills that are applicable in academic, personal, and professional contexts.

You must have heard of the phrase “Practice makes a man perfect”. Well, not just a man, practice indeed enhances perfection of every individual.

Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.

All About Daily Practice Problems on Class 11 Physics Gravitation NCERT Chapter 7

Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on Class 11 Physics Gravitation NCERT Chapter 7 useful.

Last but not least, to get the best hold on Class 11 Physics Gravitation NCERT Chapter 7, do not forget to check out:

  • Gravitation Class 11 Physics Best videos
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  • Class 11 Physics Gravitation Revision notes
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  • Class 11 Physics Sample papers