Students show how pulleys make work easier by changing either the size or the direction of a force, or both. They observe that the force used on a pulley system becomes less as more pulleys are added.

Student Resources

• 7.1 Vocabulary
• 7.2 A Fixed Pulley
• 7.3 A Movable Pulley
• 7.4 A Pulley System
• 7.5 Section 7 Assessment

Learn by Reading

For additional content-area reading, check out the Houghton Mifflin Science eBook: Grade 2, Unit F, page 28.