Question

help ASAP!

Answer 1

What is the maximum height achieved if a 0.500 kg mass is thrown straight upward with an initial speed of 85.0 m·s–1? Ignore the effect of air resistance.

Answer 2

saiffffffffffff :))

Answer 3

AlaaaaaaaaaaaaaA :))

Answer 4

o_0

Answer 5

too much screaming my throat hurts x_X

Answer 6

u = 85
a = -10m/s
v = 0
s = ?

v^2 = u^2 + 2as

Answer 7

The mass in fact doesn't matter, kinetic energy into potential energy.

Answer 8

Oh man! Sorry for the throat.

Answer 9

what is that formula called ?

Answer 10

careful there @saifoo.khan ....

Answer 11

There are 3 basic formulas for motion:
http://newton.burney.ws/physics/review/PhysicsEquations/kinematicseqs.gif

Answer 12

@lgbasallote , Ikr. I can smell something wrong too.
@Ala123 , let me recheck.

Answer 13

\[E_{kin}=E_{pot}\] \\ \[ \frac{1}{2}mv^2 = mgh\]

\[ h= \frac{v^2}{2g} \]

Answer 14

oh

Answer 15

it's actually a physics question so it's not that simple

Answer 16

Conservation of energy.

Answer 17

:DDD

Answer 18

understand what I did?

Answer 19

My brain is in sleep mode.
Sorry @Ala123 :(

Answer 20

yea kinda, you cancelled out the mass i see

Answer 21

this is the reason why physics questions shouldnt be put in mathematics group :p lol

Answer 22

haha that's ok @saifoo.khan :D

Answer 23

@saifoo.khan got humiliated because of it

Answer 24

Btw, lgba's photo looks like a goat.

Answer 25

lol xD

Answer 26

yeh @Ala123, gravitation doesn't really like mass in isolated systems, most of the time in cancels out *grins*

Answer 27

i see, my answer is 7225 can you check?

Answer 28

just because I am curious, 85 m/s initial speed? That is so impressing. What a hulk.

Answer 29

LOL.

Answer 30

lol

Answer 31

368.24 meters

Answer 32

definitely not a human being, if you need to add a comment.

Answer 33

wait..what did i do wrong o_0?

Answer 34

Someone from the X-Men maybe.

Answer 35

h=85^2/ 2(.500) isn't it ?

Answer 36

\[ h = \frac{v^2}{2g} = \frac{85^2}{2*9.81} = 368.24 m\]

Answer 37

where the 9.81 came from o_0

Answer 38

I cheated with the units by the way, if you do this in a physics exam, always carry the units with you, sometimes it will help you to see if they cancel and your formula makes sense.

Answer 39

was always there, g = gravitation constant for the earth, 9.81 m/s^2

Answer 40

ohhh g = gravitation? i thought grams wow..... =.=

Answer 41

oh no no, all constants.

Answer 42

In a formula physicist only write constants, if they write units they write it in [brackets] to avoid confusion, doesn't always work though hehe

Answer 43

i see..but this problem is actually my chemistry homework, soo weird o_0

Answer 44

haha, that made me laugh *grins*

Answer 45

:DD

Answer 46

ok let me try the next problem...kinda similar to this, will you check my answer though ?

Answer 47

I will give it a try, sure.

Answer 48

But if it is chemistry, I really can't help hehe, I managed to forget everything so quickly.

Answer 49

If a rock climber accidentally drops a 51.0 g piton from a height of 285 meters, what would its speed be just before striking the ground? Ignore the effects of air resistance.

Answer 50

almost same problem

Answer 51

for this problem..when you write the formula do you just cancelled out the "m" ?

Answer 52

is it okay if I solve it in a physical way?

Answer 53

yeah! the last problem was right.

Answer 54

i got crazy numbers..29070 m.s^-1