se the letter of the correct answer and write it on the blank before each
D. push
C. machines
1. Which help us do work easier and faster?
A. force
B. pull
2. A rigid bar free to rotate on a fixed point is
A. Fulcrum
B. lever
3. A kind of lever where the fulcrum lies between the load and the applied effort is
D. load
C. object
D. high class
A. Third class
D. high class
A. Third class
A. Wedge
B. first class
C. second class
4. What kind of lever has the effort between the load and the fulcrum?
B. first class
C. second class
5. A shovel is an example of what kind of simple machine?
D. ramp
B. lever
C. pulley
6. What consists of a plane tilted in an angle with one end higher than the other?
A. Lever
D. Screw
B. inclined plane
C. pulley
7. What consists of an inclined plane wrapped around a pole or a cylinder?
A. Friction
D. pulley
B. wheel and axle C. screw
8. Knife is an example of what kind of simple machine?
A. Inclined plane
C. wedge
D. pulley
9. What machine has examples such as stairways and ramps?
A. Inclined plane
C. wedge
D. pulley
10. A photocopying machine multiplies several photos in an hour. This describes that
B. ramp
B. rope
C. machine changes direction
D. machine multiplies speed
A. Machine multiplies force