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Practice each question, then open the answer or worked solution.
Correct the following.
i. The motion of a swing is an example of rectilinear motion.
ii. $1m = 1000cm$
Ans: During the movement of swing periodic motion is shown rather than rectilinear motion. As, the swing is repeating its motion after a certain period of time.
Ans: A cm is a $\dfrac{1}{{100}}th$ part of a metre. So, $1m = 100cm$
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 ............
Ans: Circular
Ans: Periodic
Ans: Along; straight
Ans: Metre
Write one example for each of the following type of motion.
i. Rectilinear
ii. Circular
iii. Periodic
iv. Circular and periodic
Ans: Parade of army.
Ans: Moving blades of a fan.
Ans: Motion of a swing.
Ans: Tip of minute hand of a clock.