Pressure

Question 1

Remember to calculate pressure final, what to take into consideration when pressure is trying to blow away

Answer 1

Pressure out of a bottle will be opposed by the ATMOSPHERIC PRESSURE too, take this into account and you can work out net pressure escape and thus force

Question 2

Why did question not use pressure from water?

Answer 2

Probably because it was NGELIGIBLE compared to the pressure from pump

Now if you can’t ever work something out, try do it without it and if you get question correvt take concept and move on

Question 3

What does final height depend on, why can’t we say less acceleration so less height

Answer 3

If the time of lower accelrwtion is a lot then it could reach higher height

Have to say depends on both accelrwtion and time