Question

I NEED HELP WITH A MAGNITUDE, NET FORCE QUESTION!! PLEASE HELP!

Answer 1

What is the question?

Answer 2

Four balls thrown in the air you are given a figure that tells you the velocity and mass and it asks you to solve for the magnitude of the net force.

Answer 3

I just do not understand how to set the problem up.

Answer 4

can you find the force vector for one?

Answer 5

i don't have acceleration

Answer 6

F=M*A

Answer 7

you have the velocity right? V'=a

Answer 8

whats 4m/s in acceleration?

Answer 9

that is not velocity it is speed. or |V(t)|. what is the direction?

Answer 10

better put is this in 2d or 3d

Answer 11

alright and its upward

Answer 12

i don't know

Answer 13

we will go with 2d

Answer 14

ok

Answer 15

a=-9.8 m/s or gravity

Answer 16

the balls are in mid air right?

Answer 17

no they are being thrown and going up.

Answer 18

this is really starting to frustrate me...

Answer 19

true but the only force acting on them in mid air is gravity. so your acceleration vector will look like <0,-9.8>
your velocity vector will be <0,-9,8t>+<c1, c2>= <what it tells you for velosity> solve for c1

position vector = <c1t,c2t-(1/2)*-9.8t^2>

Answer 20

i don't need position.

Answer 21

you do not make sense

Answer 22

lol, maybe I when ahead of you class a bit. Acceleration= <0,-9.8>

Answer 23

I GET THAT. my problem isn't asking for that though. I need the force going upward. I can solve for the force going down.

Answer 24

There is not force going up, there was a force going up. If you have the initial velocity you an use that to calculate the force that was there.

Answer 25

the ball has not switched directions! its going up!

Answer 26

direction of the velocity dose not matter. only acceleration.

Answer 27

k

Answer 28

I take it you understand?

Answer 29

no i don't but you keep confusing me so i am done trying to understand what you are trying to say so bye

Answer 30

maybe is gave you to much info. sum the masses multiply by gravity the sine should be '-'.

Answer 31

please stop you are not helping.