Question

A ball is thrown vertically upward from the ground with an initial velocity of 20ft/sec.

Need help here in determining the equations. o.o

Answer 1

what are you from this given data?

Answer 2

what do you mean? o.o

Answer 3

What does the question exactly want?

Answer 4

well, it asks for the equation for the length of the time the ball will be going up and maximum height of the ball can reach. Then we need to solve for those.

Answer 5

just the equation because we will use derivatives to solve it.

Answer 6

\[K = \frac{ 1 }{ 2 } mV ^{2}\]

Answer 7

K = Energy
m = Mass
V = speed

Answer 8

was there any constants included? o.o

Answer 9

\[U = mgh\]
U = Energy

Answer 10

m=mass
h=high

Answer 11

I think you can use these equations to solve th question...

Answer 12

Now give me a question like this...

Answer 13

in this question initial velocity is only data,by using this initial velocity which means time T=0 this is only idea i got from the question

Answer 14

yes!the question has to give us the energy and mass too.

Answer 15

but it didn't gave anything else..

Answer 16

please clearly say what i find from the question

Answer 17

@Ryuusei , I will give you a question like this...wait...

Answer 18

It is a easy question...let me write it...

Answer 19

mass= 200gr
V = 72Km/h
K=?Kj

Answer 20

solve

Answer 21

what is k

Answer 22

K is Energy

Answer 23

what type of energy like potential,kinetic or some think else

Answer 24

Kinetic Energy

Answer 25

http://en.wikipedia.org/wiki/Kinetic_energy

Answer 26

look

Answer 27

1/2 mv2

Answer 28

yes!but Ryuusei sholud find the answer...

Answer 29

what can you find out from this question ? but our aim to determining qeuation

Answer 30

sorry equation

Answer 31

This question is the easier form of that question...OK?

Answer 32

yes

Answer 33

I keep on thinking.. but there's this answer that has 32t in it. I dunno why. This is from our teacher, but I don't know how he get it.

v = 32t + 20. dunno with the signs, though. My copy is very blurry.

Answer 34

that's why, I'm just asking for an equation.. o.o
I already have the answers, but there's no solution. This is just like a practice, but I can't seem to trace it.

Answer 35

nice question
i will try to give answer

Answer 36

this is the formula for a motion along a straight line final velocity =initial velocity+acceleration*time\[v=u+at\]

Answer 37

cool.

Answer 38

are you have any doubt

Answer 39

no I don't have any doubts. I'm clearly accepting opinions. o.o

Answer 40

but i have a doubt
what is option 0.0

Answer 41

@diwa , It's a nice formula!!Thank you!It's easier than 1/2mv2 and mgh...

Answer 42

the answers says v(t) and s(t). v(t) falls into that one.. I dunno about s(t)

Answer 43

s(t) is the displacement of the body

Answer 44

okay.. I'll try to do this v(t).. but there isn't any.. acceleration given. ._.

Answer 45

if there is any displacement

Answer 46

or velocity

Answer 47

it's just intial velocity = 20 ft/sec.

Answer 48

ok have you only answer or solvation steps

Answer 49

I'm almost there. I just don't know where this example got the 32t.. @_@

Answer 50

ok ok thank you