Classify the following as motion along a straight line, circular or oscillatory motion:(i) Motion of your hands while running.(ii) Motion of a horse pulling a cart on a straight road.(iii) Motion of a child in a merry-go-round.(iv) Motion of a child on a see-saw.(v) Motion of the hammer of an electric bell.(vi) Motion of a train on a straight bridge.

(i) Oscillatory motion

While running, the hands move to and fro and repeat their motion after a given interval of time. Hence, it is an oscillatory motion.

(ii)Straight line

The horse is pulling a cart on a straight road. Therefore, it has a motion along a straight line.

(iii)Circular motion

Merry-go-round has a circular motion. Therefore, a child sitting inside it will also have a circular motion.

(iv) Oscillatory motion

The child on a see-saw goes up and down continuously. It oscillates up-down. Therefore, it is an oscillatory motion.

(v)Oscillatory motion

The hammer hits the electric bell and vibrates rapidly. Therefore, it is an oscillatory motion.

(vi) Straight line

The train is moving on a straight bridge. Therefore, it has a motion along a straight line.