Chapter – 16 Light Light: The natural agent that stimulates sight and makesthings visible. Lightis reflected from allsurfaces. It isa...

Chapter – 12 Friction Friction is a force thatopposes the relative motion between twosurfaces of objects in contact. Theforce of friction...

Chapter – 11 Force and Pressure Force: A push ora pull, thatchanges or tendsto change thestate of restor of uniform motion of anobject or...