S= 20* 2.5 + 1/2 2* 12.5
= 5 + 12.5
= 17.5 m
We have to find "s",that is,distance.
So we will use the formula= v^2-u^2=2as
Distance, d = 56.25 m
It is given that,
Initial velocity of train, u = 20 m/s
Final velocity of train, v = 25 m/s
Acceleration of the train, a = 2 m/s²
We have to find the distance covered by the train. It can be calculated using third equation of motion. It is given as :
x is the distance covered by the train.
x = 56.25 m
Hence, the distance covered by the train is 56.25 m
here V=25,U=20 and a=2
by substituting, we get
hence the distance covered is 225/4
after 4 hours will observe that there will be no change in the apparatus of student and in the apparatus of student b the water level will rise in the tube. experiment is to show that we release co2 during respiration. the germinating seeds respire and take the air present in the flask will take o2 and release co2, now koh is a good absorber of co2 so it will absorb leading to the formation of a vacuum in the flask so the water level rises in the tube. whereas in the apparatus of student a the vacuum is not formed because the cotton plugs have large air spaces.
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