For an object moving along a straight path in an accelerated motion, it is not necessary that it always goes away from the earth.

Given, initial velocity = u, height = h and a = g. At the highest point, the final velocity becomes zero, i.e., v = 0. From the third equation of motion, V² = U² – 2gh 0 = u² – ...

In merry-go-round, the speed is constant but velocity is not constant, because its direction goes on changing i.e., there is acceleration in the circular motion. So, we can say that the boy is in accelerated motion.

Camillo Golgi, discovered the method of staining individual cell structures. He used weak solution of silver nitrate to study golgi apparatus.

Rusting of an object made of iron is called rusting. Rust is a chemical change because rust is a chemical compound (hydrated iron oxide), completely different from the element iron (Fe).