An interactive approach which introduces the concept of force as something that pushes or pulls and includes a discussion of such forces as gravity, wind, magnetism, weight, and water'
There are forces at work whenever you throw a ball, run up the stairs, or push your big brother off the couch. Want to learn more about the forces around you? read and find out!'
Buku ini membahas mengenai fungsi pengungkit dan kegunaannya dari benda-benda yang ditemui sehari-hari. Dengan disertai percobaan mudah, membacanya menjadi lebih seru.'
What shape makes a good wheel? Why do you whiz down a slide? How can Steve pull Amy and Jo in his wagon? Why did Amy slip on the grass? Jooin Steve, Amy, Zack, and Jo as they investigate why some things roll and others slide. Do the projects with them an
Buku ini membahas tentang kecepatan, dari sepeda, perahu, mobil, kereta dan roket. Ada juga percobaan menarik dan hal-hal untuk dibuat dan dikerjakan bersama-sama.'