Question

(a) Consider 3 objects of equal masses. Picture these objects experience combinations of different applied forces, However, this time include different applied forces, f1, f2. Find the net force on each object.
(b) If each of the objects above were to be opposed by an external force, such that, they would decelerate to rest, indicate the relative sizes of these deceleration forces necessary to oppose the net force.
(c) From above, rank the magnitudes of the decelerations necessary to stop the objects in motion

Answer 1

ok so far I have: 3 objects are equal to 12Kg
( Applied Forces) Object 1: Applied Forces are 5N<------>10N
Object 2: Applied Forces are 6N<------> 12N
Object 3: Applied Forces are 10N<----->20N

(Net Forces) Object 1: = 5 Newtons
Object 2: = 6Newtons
Object 3: 10Newtons
Force = Mass * Acceleration

Answer 2

Ok, so the forces are pulling in the exact opposite directions? That's what I was confused about. There are virtually infinite ways the two forces can be acting on the objects, so there would be virtually infinite ways to decelerate it.

Answer 3

I am very confused... This is my first time taking Physics 102 and I am struggling more than I anticipated

Answer 4

well here since there isnt the same amount of force acted upon each object from both directions then their isn't equilibrium
present

Answer 5

Lets deal with it one by one.

Answer 6

ok !!

Answer 7

First consider the case (a)

Answer 8

Do we have to take three objects one y one or simultaneously ?

Answer 9

*by

Answer 10

Teachers comment: From (1)(a)-(b) above, rank the magnitudes of the decelerations necessary to stop the objects motion
so I guess Simultaneously

Answer 11

Is this the answer u have got ?
\(\color{blue}{\text{Originally Posted by}}\) @Ms.Castillo
ok so far I have: 3 objects are equal to 12Kg
( Applied Forces) Object 1: Applied Forces are 5N<------>10N
Object 2: Applied Forces are 6N<------> 12N
Object 3: Applied Forces are 10N<----->20N

(Net Forces) Object 1: = 5 Newtons
Object 2: = 6Newtons
Object 3: 10Newtons
Force = Mass * Acceleration
\(\color{blue}{\text{End of Quote}}\)

Answer 12

this is my start to answering the assignment so basically (part a)
but part b is where I am stuck

Answer 13

okay i got it. So u have taken second force in opposite direction for every object.

Answer 14

yes in order to get the net force

Answer 15

ok now let's see the second part of ur question.
I'll do it for one object in order to give uh an example.

Answer 16

thank you!!
so do I have part a correct?

Answer 17

Yes it is correct. But as @iPwnBunnies said two force can act on an object in infinite way. So net force can also be 15 N. It all depends upon the orientation of two forces.

Answer 18

ohhh ok I see we can either add the two forces together or subtract

Answer 19

so can let me ask you, Subtracting them means what exactly?

Answer 20

does it mean the objects are pulled in opposite direction instead of same direction?
adding together means same direction VS Subtracting which means opposite direction?

Answer 21

Basically net force for two forces say A & B =
\(\large \sf \sqrt{A^2+B^2+2ABcos\theta}\), where \(\sf \theta\) is the angle between two forces A & B

Answer 22

\(\color{blue}{\text{Originally Posted by}}\) @Ms.Castillo
does it mean the objects are pulled in opposite direction instead of same direction?
adding together means same direction VS Subtracting which means opposite direction? \(\huge\checkmark\)
\(\color{blue}{\text{End of Quote}}\)

Answer 23

Got it ?

Answer 24

kinda confused on your diagram