Multiple Choice
Which branch of physical science is most concerned with studying nonliving matter and energy?
150
views
9. Work & Energy
Intro to Energy & Kinetic Energy
Struggling with Physics?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which formula correctly represents the calculation of mechanical energy in a system?
A
Mechanical Energy = Kinetic Energy - Potential Energy
B
Mechanical Energy = Kinetic Energy × Potential Energy
C
Mechanical Energy = Kinetic Energy + Potential Energy
D
Mechanical Energy = Potential Energy - Kinetic Energy
Verified step by step guidance1
Understand the concept of mechanical energy: Mechanical energy is the sum of kinetic energy and potential energy in a system. It represents the total energy available to do work.
Identify the components: Kinetic energy is the energy of motion, given by the formula \( KE = \frac{1}{2}mv^2 \), where \( m \) is mass and \( v \) is velocity. Potential energy is the energy stored due to position, often given by \( PE = mgh \) for gravitational potential energy, where \( m \) is mass, \( g \) is acceleration due to gravity, and \( h \) is height.
Analyze the given options: The problem provides several formulas for mechanical energy. We need to determine which one correctly represents the sum of kinetic and potential energy.
Evaluate the correct formula: The correct formula for mechanical energy is \( ME = KE + PE \), which means mechanical energy is the sum of kinetic and potential energy.
Conclude with the correct understanding: The correct representation of mechanical energy in a system is \( ME = KE + PE \), confirming that mechanical energy is the total energy due to both motion and position.
4:10mWatch next
Master Intro to Energy & Types of Energy with a bite sized video explanation from Patrick
Start learningRelated Videos
Related Practice
Intro to Energy & Kinetic Energy practice set
Problem sets built by lead tutorsExpert video explanations