EASY
7th CBSE
IMPORTANT
Earn 100

The discovery of which principle made the accurate measurement of time possible? What is the principle?
 

Important Questions on Motion and Time

EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 14 - Motion and Time>EXERCISES>Q C
What do you mean by 'time period' of a pendulum?
 
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 14 - Motion and Time>EXERCISES>Q C
Give an example of a periodic change related to the earth that can be used to measure time.
 
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 14 - Motion and Time>EXERCISES>Q C
On what principle are modern electronic watches based?
 
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 14 - Motion and Time>EXERCISES>Q C
When is an object said to be in uniform motion?
 
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 14 - Motion and Time>EXERCISES>Q D
What is the SI system of units? Name two other systems of units.
 
HARD
7th CBSE
IMPORTANT
Living Science 7>Chapter 14 - Motion and Time>EXERCISES>Q D
A car travels a distance of 270 kilometres in 412hours. Find its speed.
EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 14 - Motion and Time>EXERCISES>Q D

A cheetah runs a distance of 200 metres in 10 seconds. What is the speed of the cheetah in

(a) m/s,
(b) km/h?

EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 14 - Motion and Time>EXERCISES>Q D

An aeroplane takes 7 hours to travel from New Delhi to London. If the plane travels at a uniform speed of  950 kilometres per hour, find the distance between New Delhi and London.