Work and Energy Flashcard

Front

What type of energy is related to the temperature of an object?

Back

Thermal energy is the energy that comes from the temperature of an object, which is a measure of the average kinetic energy of its particles.

Front

How do you calculate work done when a force is applied over a distance?

Back

Work done (W) is calculated using the formula W = F × d, where F is the force applied and d is the distance moved in the direction of the force.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work in the SI system is the Joule (J). One Joule is defined as the work done when a force of one newton displaces an object by one meter.

Front

What type of energy is converted to kinetic energy in a rocket when its engines are fired?

Back

Chemical energy is converted to kinetic energy in a rocket when its engines are fired, as the fuel undergoes combustion.

Front

What is elastic potential energy?

Back

Elastic potential energy is the energy stored in an object when it is stretched or compressed, such as in springs or rubber bands.

Front

What is the relationship between kinetic energy and mass?

Back

Kinetic energy (KE) is directly proportional to the mass of an object and the square of its velocity, expressed by the formula KE = 1/2 mv².

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How does friction affect work done?

Back

Friction opposes motion, which means it can reduce the amount of work done on an object by dissipating energy as heat.

Front

What is the difference between renewable and non-renewable energy sources?

Back

Renewable energy sources can be replenished naturally (e.g., solar, wind), while non-renewable energy sources are finite and will deplete over time (e.g., fossil fuels).