Maths/science A Level question... help???

[RomanNose]

No, because v^2=u^2+2as assumes constant acceleration. Your acceleration isn't.

Ahh yes, though couldn't you still use the other equation to find the terminal speed?

 

[Morbius]

Ahh yes, though couldn't you still use the other equation to find the terminal speed?

Yes, at terminal velocity drag will equal the gravitational force so it's just a case of setting them equal and rearranging for velocity as you have done.

 

[Aid4nTheNoob]

hey guys, so i was reading through some old science papers today, and spotted this. any of you guys able to work it out? you are a better man than I if so.

A cube measuring 0.92 square metres, weighing 101.6kg is pushed from a plane at 1371.6 metres.

1) What is the time of the freefall ??
2)What will be the speed just before impact ??
3)Will the cube reach terminal velocity, if yes how long after the start ??

cheers if you can help!!

1. 7

2. 7

3. 8


How do I get to this conclusion? Add 7+7+8. That makes 22. There are 3 questions. 22 divided by 11 = 3.

Don't dare argue with my logic.