جزئیات کتاب
فرمت
کیندل
صفحات
24
زبان
انگلیسی
منتشر شده
Jan 1, 2014
ناشر
The Child's World
ISBN-10
1631431293
ISBN-13
9781631431296
توضیحات
Readers learn how this simple machine makes it easier to move things to different levels. They learn how flatter slopes use less effort than steeper slopes. By the end of the book, readers know the difference between complex and simple machines and how inclined planes are used in everyday life to make lifting and lowering objects easier.