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  • Which of the following are not correct ?

2. Which of the following is not correct?

(i) The basic unit of time is second.
(ii) Every object moves with a constant speed.
(iii) Distances between two cities are measured in kilometres.
(iv) The period of a given pendulum is constant.
(v) The speed of a train is expressed in m/h.

Answers (1)

best_answer

The options (ii), (iv) and (v) are not correct.

(ii) Object can move with variable or constant speed.

(iv) The period of the pendulum depends on the length of the thread. So, it is constant for a particular length.

(v) Speed of the train is measured either in km/h or m/s not in m/h

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manish painkra

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