Practice Energy Conservation: The Fundamental Law - 4.5 | Work, Energy & Simple Machines | IB IMYP Grade 8 Physics
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Academics

Grades

Grade 8 Grade 9 Grade 10 Grade 11 Grade 12

Curriculum

CBSE ICSE IB
Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Professional Courses
Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

games
Typing
Memory
Math
English Adventures
Knowledge

4.5 - Energy Conservation: The Fundamental Law

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.

Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does the Law of Conservation of Energy state?

💡 Hint: Think about changes in energy during physical processes.

Question 2

Easy

Give an example of how potential energy is converted into kinetic energy.

💡 Hint: Consider what happens to an object as it moves downward.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

Which of the following best describes the Law of Conservation of Energy?

  • Energy can be created
  • Energy cannot be created or destroyed
  • Energy always disappears

💡 Hint: Recall what the law truly states about energy.

Question 2

True or False: Energy can be lost from a system.

  • True
  • False

💡 Hint: Think about how energy behaves in a closed system.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A 5 kg cat climbs to a height of 3 meters. Calculate its potential energy and determine the kinetic energy just before it jumps down, assuming negligible air resistance.

💡 Hint: Use the potential energy formula for the first part and remember KE and PE relationship.

Question 2

If a machine has an input energy of 500 Joules and it performs only 350 Joules of useful work, what is its efficiency and what happens to the excess energy?

💡 Hint: Consider how to calculate efficiency and what it reveals about energy usage.

Challenge and get performance evaluation