Question

2. Which of the following are not correct?

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 time period of a given pendulum is constant.
(v) The speed of a train is expressed in m/h.
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Answer 1

Answer:

v

Explanation:

the time period of a given

Answer 2

Answer:

ii.

Explanation:

The speed of on object depends on its mass and the force applied on it to produce motion.