Inclined Plane- A slanting surface connecting a lower level to a higher level

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INCLINED PLANE: A slanting surface connecting a lower level to a higher level. Things can move up or down it.

Objectives:

Student will be able to identify an inclined plane as a surface connecting a lower level to a higher level, make an inclined plane and explore how it is used to make work easier.

Materials:

Science Journal

5-6 books

small bag filled with about 1 cup of rice or dried beans closed with a twist tie

ruler

rubber band

Question:

Which will be easier - to move the bag using the inclined plane or to move it by lifting it straight up?

Procedure:

Stack the books. Lean one of the books against the stack to make an inclined plane.

Cut rubber band and tie it to the neck of the sack.

Holding one end of the rubber band, lift the bag straight up to the top of the books. Measure the length of the stretched rubber strip.

Put the bag at the bottom of the inclined book.

Hold the end of the rubber strip, slowly pull the bag up the plane.

Measure the length of the stretched rubber strip when the bag is almost at the top.

Journal:

Record results

Write the length of the rubber strip.

Make a class chart to compare information.

Conclusion: The farther the rubber strip stretches the more force is being used.

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