Question

What is common to the following?
(a) Motion of the propeller of a flying helicopter,

(b) The minute hand of a watch,

(c) The tape of cassette recorder.

• A. All are example of translatory motion
• B. All are examples of oscillatory motion
• C. All are examples of rotatory motion
• D. All are examples of periodic motion

Answer 1

The correct option is C All are examples of rotatory motion

Motions of the propeller of a flying helicopter, the minute hand of watch and tape of cassette recorder are the example of rotatory motion. Because in rotational motion every point on the object moves on the different circular path with same angular speed.
Correct answer is option C.