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To plonuos 1. We put oil or greese on movingparts of machines. This makesthe parts move easily. Why?2. Many things have wheels.Wheels make things easier tomove. Why?3. What makes a sledge moveeasily?4. How can the friction betweenroad and vehicle be increased?5. Why is it difficult to move a boxfull of books on floor?6. Why a ramp is used in front ofthe gate of a house? pls answer the questions |
| Answer» KER GANG and thalapathy VIJAY FANS | |