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Types of Motion

Which of the ...

Question

Which of the following is a combination of rectilinear and rotatory motion?
(a) a rolling ball
(b) a branch of a tree moving to and fro
(c) the surface of a table being played
(d) heartbeat of a healthy person

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Solution

(a) a rolling ball
A rolling ball rotates around the axis passing through it. It also moves in a straight line. Hence, it has both rectilinear and rotatory motion.

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