Mechanical energy is the energy possessed by an object due to its motion or position. It is the sum of kinetic energy and potential energy in an object.

Kinetic energy is the energy an object has due to its motion. The kinetic energy of an object depends on its mass and its velocity. The formula for kinetic energy is:

KE = 0.5 * m * v^{2}

Where:

- KE = kinetic energy
- m = mass of the object
- v = velocity of the object

Potential energy is the energy an object has due to its position or state. There are several types of potential energy, including gravitational potential energy and elastic potential energy. The formula for gravitational potential energy is:

PE = m * g * h

Where:

- PE = potential energy
- m = mass of the object
- g = acceleration due to gravity (approximately 9.81 m/s
^{2}) - h = height of the object

According to the law of conservation of energy, the total mechanical energy of an object remains constant if only conservative forces are acting on it. This means that the sum of kinetic and potential energy remains constant as long as only conservative forces, such as gravity or spring forces, are involved.

Examples of mechanical energy include a moving car (kinetic energy), a pendulum at its highest point (potential energy), and a compressed spring (elastic potential energy).

- What is mechanical energy?
- What are the two components of mechanical energy?
- What is the formula for kinetic energy?
- What factors affect an object's kinetic energy?
- What is the formula for gravitational potential energy?
- What are the types of potential energy?
- What is the law of conservation of mechanical energy?
- Give examples of objects or systems demonstrating mechanical energy.

Study GuideProperties of matter and Energy Worksheet/Answer key

Properties of matter and Energy Worksheet/Answer key

Properties of matter and Energy Worksheet/Answer key

Properties of matter and Energy Vocabulary/Answer key

Properties of matter and Energy Vocabulary/Answer key

Properties of matter and Energy

PHYSICAL SCIENCE (NGSS)

Matter and Its Interactions

Students who demonstrate understanding can:

Develop a model to describe that matter is made of particles too small to be seen.