Work and Energy in Physics

Front

What happens when positive work is done on a system?

Back

Energy external to the system is transferred into the system.

Front

What does the work-energy theorem state?

Back

The total work done on a system is equal to the change in the system’s kinetic energy.

Front

What is energy in the context of a system?

Back

A quantitative property associated with the motion of particles and the relative positions of particles.

Front

What is the SI unit for energy?

Back

Joule (J) - the same unit as for work.

Front

What is kinetic energy?

Back

The energy associated with an object’s motion.

Front

How does the speed of an object affect its kinetic energy?

Back

The faster an object is moving, the greater its linear kinetic energy.

Front

What is an isobaric process?

Back

A thermodynamic process in which pressure remains constant.

Front

What is work in physics?

Back

A change in state of a system caused by a force applied along a displacement.

Front

When is work done by the system on the surroundings?

Back

When the system exerts a force on an external object in the direction of the object’s displacement.

Front

When is work considered positive?

Back

When the force and displacement are in the same direction.