Work and Energy Flashcard

Front

What is a closed system in physics?

Back

A closed system is one that does not gain or lose mass.

Front

What type of energy is stored in an object when it is stretched or compressed?

Back

Elastic potential energy.

Front

If the potential energy (PE) of an object is 20 J, what is the kinetic energy (KE) if the total mechanical energy is 100 J?

Back

The kinetic energy (KE) would be 80 J.

Front

In a frictionless environment, where would a roller coaster have the most kinetic energy?

Back

At the lowest point of the track.

Front

If a person does 500 J of work, how much energy is transferred?

Back

500 J of energy is transferred.

Front

What is the principle of conservation of energy?

Back

The total energy in a closed system remains constant; energy can neither be created nor destroyed, only transformed.

Front

Define work in the context of physics.

Back

Work is defined as the energy transferred when a force is applied to an object over a distance.

Front

What is the formula for calculating work?

Back

Work (W) = Force (F) x Distance (d) x cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is kinetic energy and how is it calculated?

Back

Kinetic energy (KE) is the energy of an object in motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy and how is it calculated?

Back

Potential energy (PE) is the stored energy of an object due to its position or state, commonly calculated using PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.