Activity 13
Match the definitions with their statements
STATEMENTS
Conservation of energy principle
Friction
Frictionless system
Ideal machine
Actual machine
Efficiency
DEFINITIONS
Force that makes the relative motion between two objects more difficult.
Is the ratio of energy used by a machine to the useful work the machine has done.
Energy can neither be created nor destroyed; it can only be transformed from one state to another.
Machine in which there is loss of energy (i.e., real machine)
Ideal system with no friction forces within it.
Theoretical machine in which there is no loss of energy (e.g., because of the friction).