MEDIUM
7th CBSE
IMPORTANT
Earn 100

Draw a well labelled diagram of a simple pendulum and define the term: Amplitude.

Write the formula to calculate this term.

Important Questions on Time and Motion

MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 1 - Time and Motion>EVALUATE>Q 2
Explain uniform and non-uniform motions with examples. Draw the graphs as well.
EASY
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 1 - Time and Motion>EVALUATE>Q 3
Why do we need to measure time? Name the types of devices used to measure time from ancient times to present time. Which one of them gives the most accurate time? 
EASY
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 1 - Time and Motion>EVALUATE>Q 1
Suppose, you are standing on the platform of a railway station watching the trains. There is a train passing by without stopping. It travels at 20 m/s and takes 6.9 s to pass you. What is the length of the train?
EASY
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 1 - Time and Motion>EVALUATE>Q 2
In a flat, the lift takes 15 s to go from ground floor to the fourth floor without stopping. If the height of each floor is 5 m, what is the average speed of the lift?
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 1 - Time and Motion>EVALUATE>Q 3
The bob of a simple pendulum takes 0.3 s to go from one extreme position to the mean position. What is the time period?
EASY
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 1 - Time and Motion>EVALUATE>Q 4
Anushka was sitting on a swing. She asked Atharv to help her to swing. Atharv pulled the swing 50 cm towards him and then left it. How much distance will the swing cover to complete one oscillation?
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 1 - Time and Motion>EVALUATE>Q 5

An object moves at 10 km/h for 10 minutes and then moves 15 km/h for15 minutes. Find:

Total distance travelled by the object

 Average speed of the object

MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 1 - Time and Motion>EVALUATE>HOTS
The distance between the Earth and the Sun is 14,90,00,000 km. The speed of light is 3×108 m/s. The sun stops giving out light now, how much longer will we be able to see the Sun?