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