HARD
7th CBSE
IMPORTANT
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Write the formula used to calculate the time period of a simple pendulum that completes x oscillations in y seconds.

Important Questions on Motion and Time

HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 13 - Motion and Time>STEP UP>Q 1
Why does a simple pendulum in motion stop swinging after some time even if you do not stop it yourself? 
HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 13 - Motion and Time>STEP UP>Q 2
How did the sundial help our ancestors determine the time of the day?
EASY
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 13 - Motion and Time>STEP UP>Q 2
The winning athlete may reach the finish line sometime in less than a tenth of a second before the athlete in second place. How is this short time interval measured?
HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 13 - Motion and Time>STEP UP>Q 3
A bus descends through a height of 2000 m while travelling downhill from a hill station to the plains. The bus set out at 8.00 a.m. and completed its journey at 10.00 a.m. Assume that the speed of the bus remains constant during the journey. Draw a line graph showing the vertical descent of the bus over time. Mark its progress every half an hour.
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HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 13 - Motion and Time>STEP UP>Q 3
A bus descends through a height of 2000 m while travelling downhill from a hill station to the plains. The bus set out at 8.00a.m. and completed its journey at 10.00a.m. Assume that the speed of the bus remains constant during the journey.
What is the rate of vertical descent of the bus in m/s? Also express it in km/h.
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HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 13 - Motion and Time>STEP UP>Q 4
A truck and a car set off from a point at the same time and both travel with constant speeds. The truck travels at 40km/h and the car travels at 60km/h.
Using lines of different colours, draw distance-time graphs to represent the motion of both the truck and the car over the first three hours.
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HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 13 - Motion and Time>STEP UP>Q 4
A truck and a car set off from a point at the same time and both travel with constant speeds. The truck travels at 40 km/h and the car travels at 60 km/h.
Draw a dotted line on the graph to mark the locations of the truck and car at a point 2.5 h into the journey. How far is each vehicle from the starting point?
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HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 13 - Motion and Time>STEP UP>Q 5

Draw a pie chart to represent how you spend your waking hours in a day. Use the data given in the table.

Activity Time spent
Studying 5 h
Playing with friends 1 h
Playing sports 3 h
Watching television 2 h
Reading 2 h
Eating meals 2 h
Bathing and getting ready for school 1 h
Total 16 h