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Physics
Inertia in our daily lives

We come across the phenomenon of inertia so often that we do not
give it much thought.

● A running man falls forward if he trips over a stone. His legs
stop immediately but his body continues to move forward
through inertia.
textbooks nis edu kz
● When a bus turns right, its passengers keep moving forward
Kazakhstani gymnast Anna Alyabyeva
and to the left, also through inertia. performing the ribbon.
● After running a 100 m race, the athlete cannot stop immediately. Because of inertia,
she continues to run forward, gradually slowing down.

● Think of the motion of a shuttlecock in badminton, the motion of a ball
in volleyball or the motion of a football after a player strikes it – these are
examples of motion by inertia.
● An unplugged fan and a spinning top will keep moving by inertia for a while.

● A paper plane flies by inertia, and tea that is stirred with a spoon in a cup keeps
going round, thanks to inertia. But the motion does eventually stop.

OVER TO YOU!

1. Describe what happens to 3. Ayan and Gulzat are discussing physics in the restaurant. Ayan
passengers when their bus says that the faster he throws the apple, the greater its inertia.
stops suddenly. Use the key Gulzat argues that the apple’s inertia depends on the mass of
words in this unit. the apple and not on how fast it moves. Who do you agree
with? Explain why.
2. What role does the yellow traffic
signal play? Why is it important 4. A dog always shakes itself down when it gets out of the water.
to respect traffic signs? Why do the water droplets fly off the dog?

Tour of Almaty cycle race.
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