6. Classify the following as motion along a straight line, circular or oscillatory/periodic 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.
Answers
(i) Motion of your hands while running – Oscillatory motion.
Explanation: -
During running the hands move to and fro and as this motion gets repeated after certain time interval.
Therefore it is oscillatory motion.
(ii) Motion of a horse pulling a cart on a straight road – Straight line motion.
Explanation: -
As the horse cart is moving on a straight road. Therefore motion is along the straight line.
(iii) Motion of a child in a merry-go-round – Circular motion.
Explanation: -
Motion of the merry-go-round is circular. Therefore kids sitting inside it experiences the circular motion.
(iv) Motion of a child on a see-saw – Oscillatory motion.
Explanation: -
As the see-saw goes up and down continuously .Therefore it is oscillatory motion.
(v) Motion of the hammer of an electric bell – Oscillatory motion.
Explanation: -
When the hammer vibrates the bell it starts vibrating. It is an example of oscillatory motion.
(vi) Motion of a train on a Straight Bridge – Straight line motion.
Explanation: -
The train is moving on the straight bridge. It exhibits motion of a straight line.
Answer:
i) oscillatory
ii) Motion along a straight line
iii) Circular motion
iv) Oscillatory motion
v) Oscillatory motion
vi) Motion along a straight line.