4.3.3 - Mechanical Energy
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.
Practice Questions
Test your understanding with targeted questions
What is mechanical energy?
💡 Hint: Think about energy in moving objects and heights.
Write the formula for kinetic energy.
💡 Hint: It involves mass and velocity!
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the formula for mechanical energy?
💡 Hint: Consider the definitions of kinetic and potential energy.
True or False: Mechanical energy can be created and destroyed.
💡 Hint: Think about conservation of energy.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
A 10 kg rock is dropped from a height of 40 m. Calculate its velocity just before it hits the ground.
💡 Hint: Use energy conservation principles.
During the operation of a car engine, some mechanical energy is lost due to friction and heat. If the car has 2000 J of useful mechanical energy and loses 500 J, calculate its efficiency.
💡 Hint: Remember the efficiency formula.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.