Daily Practice Problems Work, Energy and Power

Question 1:

A force of 50 N is applied at an angle of 30° to the horizontal and moves an object by 10 meters. What is the work done by the force?[Level: Moderate]

a) 250 J

b) 433 J

c) 500 J

d) 866 J

Question 2:

A 20 kg crate is pushed horizontally with a force of 80 N. If the coefficient of kinetic friction is 0.4, what is the work done by the friction force over a distance of 5 meters?[Level: Moderate]

a) 160 J

b) 200 J

c) 240 J

d) 392 J

Question 3:

A force of 120 N is applied to lift a block vertically upward by 2 meters. If the block weighs 50 N, what is the net work done on the block?[Level: Moderate]

a) 40 J

b) 100 J

c) 120 J

d) 140 J

Question 4:

A person lifts a 10 kg object vertically upward with a constant velocity of 2 m/s. What is the work done by the person?[Level: Easy]

a) 0 J

b) 20 J

c) 40 J

d) 60 J

Question 5:

A car of mass 1500 kg accelerates from 10 m/s to 30 m/s in 5 seconds. What is the average power developed by the car during this time?[Level: Difficult]

a) 1000 W

b) 18000 W

c) 2000 W

d) 2500 W

Question 6:

A spring with a force constant of 1000 N/m is compressed by 0.1 meters. What is the potential energy stored in the spring?[Level: Easy]

a) 0.05 J

b) 0.1 J

c) 5 J

d) 1 J

Question 7:

A mass of 2 kg is attached to a spring and stretches it by 0.5 meters. If the spring constant is 400 N/m, what is the potential energy stored in the spring? [Level: Easy]

a) 25 J

b) 50 J

c) 75 J

d) 100 J

Question 8:

A mass of 0.1 kg is attached to a spring and stretches it by 0.2 meters. If the spring constant is 800 N/m, what is the maximum speed the mass will attain as it oscillates?[Level: Moderate]

a) 20.45 m/s

b) 44.5 m/s

c) 17.89 m/s

d) 8 m/s

Question 9:

A block of mass 5 kg is attached to a spring with a force constant of 1200 N/m. If the block is displaced by 0.3 meters from its equilibrium position and released, what is the maximum potential energy stored in the spring during the oscillation?[Level: Moderate]

a) 5 J

b) 9 J

c) 12 J

d) 15 J

Question 10:

A block of mass 4 kg is attached to a spring with a force constant of 1600 N/m. If the block is displaced by 0.4 meters from its equilibrium position and released, what is the maximum speed the block will attain during the oscillation?[Level: Difficult]

a) 2 m/s

b) 3 m/s

c) 4 m/s

d) 8 m/s

Question 11:

A car of mass 1000 kg accelerates from rest to a speed of 25 m/s in 10 seconds. What is the work done by the net force during this time?[Level: Moderate]

a) 150 kJ

b) 62.5 kJ

c) 100 kJ

d) 75 kJ

Question 12:

A 40 kg crate is pushed up a 30° incline with a constant force of 300 N. If the coefficient of kinetic friction is 0.2, what is the work done by the friction force as the crate moves 8 meters up the incline?[Level: Difficult]

a) -864 J

b) -628 J

c) -576 J

d) -432 J

Question 13:

A force of 200 N is applied on an object, and it moves a distance of 5 meters. If the angle between the force and the direction of motion is 60°, what is the work done by the force?[Level: Easy]

a) 1000 J

b) 866 J

c) 750 J

d) 650 J

Question 14:

A person applies a force of 80 N at an angle of 45° to the horizontal and moves a cart by 6 meters. If the coefficient of kinetic friction is 0.3, what is the net work done on the cart?[Level: Moderate]

a) 180 J

b) 240 J

c) 300 J

d) 360 J

Question 15:

A 60 kg person climbs up a flight of stairs that is 4 meters high in 10 seconds. What is the work done by the person against gravity during this time?

[Level: Moderate]

a) 2400 J

b) 2000 J

c) 2354 J

d) 1200 J

Question 16:

A machine does 1000 J of work in 5 seconds. What is the power output of the machine?[Level: Easy]

a) 200 W

b) 250 W

c) 300 W

d) 350 W

Question 17:

A motor delivers 300 J of work in 15 seconds. What is the power output of the motor?

a) 20 W

b) 25 W

c) 30 W

d) 35 W

Question 18:

A car of mass 1200 kg accelerates from rest to a speed of 25 m/s in 10 seconds. What is the power developed by the net force during this time? [Level: Difficult]

a) 30 kW

b) 7.5 kW

c) 42 kW

d) 48 kW

Question 19:

A spring with a force constant of 500 N/m is compressed by 0.1 meters and then released. What is the maximum speed of the block attached to the spring when it returns to its equilibrium position?[Level: Difficult]

a) √1 m/s

b) √2 m/s

c) √3 m/s

d) √5 m/s

Question 20:

A 2 kg block is released from rest at the top of a frictionless incline that is 5 meters high. What is its speed at the bottom of the incline? [Level: Moderate]

a) 10 m/s

b) 4.95 m/s

c) 20 m/s

d) 25 m/s

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Problem-solving on JEE Physics Work, Energy and Power NCERT Chapter 6 after learning a theoretical concept is crucial for several reasons:

Application of Knowledge: Problem-solving allows you to apply the theoretical concepts of the topic JEE Physics Work, Energy and Power 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.
Understanding Deeper Concepts: When you encounter problems related to a theoretical concept that you learned in JEE Physics Work, Energy and Power NCERT Chapter 6, 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.
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.
Retention and Recall: Actively engaging in problem-solving reinforces your memory and improves long-term retention. Applying the concepts learned in Work, Energy and Power JEE Physics in practical scenarios helps you remember them better than passive reading or memorization.
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 Work, Energy and Power JEE Physics Notes on LearnoHub.com
Boosting Confidence: Successfully solving problems after learning a theoretical concept boosts your confidence in your abilities to handle Work, Energy and Power. This confidence motivates you to tackle more challenging tasks and improves your overall performance in the subject.
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 Work, Energy and Power JEE Physics Online Tests at LearnoHub.com.
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.
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.
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 Work, Energy and Power JEE 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 JEE Physics Work, Energy and Power NCERT Chapter 6

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 JEE Physics Work, Energy and Power NCERT Chapter 6 useful.

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