CBSE Class 8: Contact Forces Videos | Force and Pressure

• what is contact foece
• Newton's law
• Does it mean that the net force on an object is zero if the two forces acting on it in opposite directions are equal? please answer for these question
• name different types of forces.
• what is Newton?
• Unit of force 
• Why does a drop of water stick to the surface of glass  
• Compare with oil and watet, oil is a denser medium or watet is a denser medium?why?
• can u explain me in detail what magnitude?
• What are contact forces?

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