Question

match the pictures with the simple machines.
6.18 ______
6.19 ______
6.20 ______
a. inclined plane
b. wedge
c. screw
write the correct answers.
6.20 the scale in this picture is made with a lever. label a and b as a bar or a fulcrum.
a - _______________
b - _______________

Explanation:

1. For matching:

• 6.17: The object is a screw, which is an inclined plane wrapped around a shaft.
• 6.18: The object is an inclined plane, a sloped surface for moving loads.
• 6.19: The saw's blade is a wedge, a double inclined plane for cutting.

1. For the lever scale:

• Part A is the rigid bar that pivots, so it is the bar.
• Part B is the fixed point the bar pivots on, so it is the fulcrum.

Answer:

6.17: C. screw
6.18: A. inclined plane
6.19: B. wedge
A - bar
B - fulcrum