Work and Machines
Name: ______________________ Date: ____________
Write the letter of the matching item on the line next to each number.
1. Efficiency
A. Skillfulness in avoiding wasted time and effort
2. Kinetic
B. A rigid bar pivoted about a fulcrum
3. Machine
C. Use of physical or mental energy
4. Effort
D. Relating to the motion of material bodies and the forces associated therewith
5. Conservation
E. A push or a pull
6. Input
F. Any mechanical or electrical device that transmits or modifies energy to perform or assist in
7. Force
G. A statement that expresses a personal opinion or belief or adds information
8. Lever
H. The maintenance of a certain quantities unchanged during chemical reactions or physical
9. Output
I. A division of some larger or more complex organization
10. Arm
J. Production of a certain amount