Energy stores and systems

Question 1

What is another way of saying work done?

Answer 1

Energy transferred

Question 2

What is a system?

Answer 2

A system is a fancy word for a single object eg the air in a pistol or a group of objects eg two colliding vehicles they your interested in

Question 3

When energy is transferred to an object the energy goes to the objects energy store name eight energy stores

Answer 3

Thermal, kinetic, gravitational potential, elastic potential, chemical, magnetic, electrostatic and nuclear.

Question 4

True or false: energy is never used up it’s transferred between different energy stores

Answer 4

True

Question 5

How is energy transferred?

Answer 5

Energy is transferred mechanically (by a force doing work), electrically (work done by moving charges), by heating or radiation (eg light and sound).

Question 6

What happens when a system changes?

Answer 6

Energy is transferred. It can be transferred into or away from the system, between different objects in the system or between different types of energy stores.

Question 7

What are closed systems?

Answer 7

Closed systems are systems where matter and energy can’t enter or leave. The net change in the total energy of a closed system is always zero.

Question 8

What is the formula for work done/ energy transferred?

Answer 8

Work done = force applied x distance moved