While travelling in a train, it appears that the trees near the track are moving whereas co-passengers appear to be stationary. Explain the reason.
Four children measure the length of a table which was about
2 m. Each of them used different ways to measure it.
(i) Sam measured it with a half metre long thread.
(ii) Gurmeet measured it with a 15 cm scale from her
geometry box
Four children measure the length of a table which was about
2 m. Each of them used different ways to measure it.
(i) Sam measured it with a half metre long thread.
(ii) Gurmeet measured it with a 15 cm scale from her
geometry box
Write one example for each of the following type of motion.
(i) Rectilinear
(ii) Circular
(iii) Periodic
(iv) Circular and periodic
Fill in the blanks
(i) Motion of an object or a part of it around a fixed point is
known as ……………. motion.
(ii) A body repeating its motion after certain interval of time
is in ……….. motion.
(iii) In rectilinear motion, object moves……….. a ………… line.
(iv) SI unit of length is …………
Correct the following.
(i) The motion of a swing is an example of rectilinear motion.
(ii) 1m = 1000 cm
Paheli moves on a straight road from point A to point C. She
takes 20 minutes to cover a certain distance AB and 30 minutes
to cover the rest of distance BC. She then turns back and
takes 30 minutes to cover the distance CB and 20 minutes to
cover the rest of the distance to her starting point. She makes
5 rounds on the road the same way. Paheli concludes that her
motion is
(a) only rectilinear motion.
(b) only periodic motion.
(c) rectilinear and periodic both.
(d) neither rectilinear nor periodic
The distance between Delhi and Mumbai is usually expressed
in units of
(a) decametre
(b) metre
(c) centimetre
(d) kilometre
The distance between Delhi and Mumbai is usually expressed
in units of
(a) decametre
(b) metre
(c) centimetre
(d) kilometre
What are the adaptive features of a lion that helps it in hunting?
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