Question

# Which of the following are 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 kilometers.(iv) The time period of a given pendulum is not constant.(v) The speed of a train is expressed in m$$/$$h.

Solution

## We know that,(i) The basic unit of time is second, second is the SI unit of time.(ii) Every object may or may not moves with a constant speed. Some are accelerating also. (iii) The Distance between two cities are measured in kilometers. it is big unit of distance.(iv) The time period of a given pendulum is always constant because it depends on the length of the pendulum.(v) The speed of a train is measured in km/h and in m/s.So, we can say that, (ii), (iv) and (v) are not correct statements.Hence, This is the correct answer.ScienceNCERTStandard VII

Suggest Corrections

0

Similar questions
View More

Same exercise questions
View More

People also searched for
View More