Energy is a fundamental concept in science that connects various natural phenomena and represents the ability to perform work. It exists in many forms, such as mechanical, heat, light, sound, electrical, chemical, and nuclear energy, and can be transformed from one form to another. For example, running water possesses energy that can power turbines or mills. Mechanical energy, a key type, is divided into kinetic energy, associated with motion, and potential energy, linked to an object's position or configuration.
What is energy?
Energy is the ability to do work and is a fundamental concept that connects natural phenomena in science.
What are the various forms of energy?
The main forms of energy include mechanical, heat, light, sound, electrical, chemical, and nuclear energy.
What are the two types of mechanical energy?
Mechanical energy is divided into kinetic energy (energy of motion) and potential energy (energy of position or configuration).
How can energy be transformed?
Energy can be converted from one form to another, such as chemical energy in fuel being transformed into heat and mechanical energy in engines.
How is the energy of running water utilized?
The energy of running water is used to power devices like water turbines and mills, converting it into mechanical or electrical energy.
Which of the following is NOT a form of energy?
a) Electrical energy
b) Mechanical energy
c) Gravitational force
d) Heat energy
Answer: c) Gravitational force
What type of energy is associated with motion?
a) Potential energy
b) Heat energy
c) Kinetic energy
d) Nuclear energy
Answer: c) Kinetic energy
What type of energy is stored in a body due to its position?
a) Sound energy
b) Potential energy
c) Electrical energy
d) Light energy
Answer: b) Potential energy
Which of these is an example of energy transformation?
a) Chemical energy in food converted to mechanical energy in muscles
b) Light energy converted into heat energy by a mirror
c) Heat energy converted into potential energy in water
d) Mechanical energy stored in batteries
Answer: a) Chemical energy in food converted to mechanical energy in muscles
What is the source of energy in a hydroelectric power plant?
a) Heat energy
b) Mechanical energy of running water
c) Nuclear energy
d) Electrical energy
Answer: b) Mechanical energy of running water