- #1

xailer

- 23

- 0

**I can't study on until I get this--please do help me**

hello

Perhaps a little introduction. I've quit high school 7 years ago and recently decided to finish it and as such I'm learning physics at home by myself.

I hope you guys can answer all three questions in (gory details) since they are kinda related and knowing just part of the complete answer won't do me much good

A) Suposse we have a box with some mass and a rope attached to the left side of a box. If some external force F pulls this box to the right then box will aplly same force F to the rope.

And like wise, rope will exert force -F to the box. Now box has two external forces acting on it : one is F that is trying to pull box to the right, and -F that is trying to pull it to the left. Which would suggest that the two external forces acting on box cancel each other out

I'm confusing something here

B)I'm not even shure how to ask it. If I want to pull an object with mass m and I apply force F to it, then ( due to third Newton law ) object will apply force -F on me. But due to inertia of an object, how much smaller will the net force be ?

C)Two objects with

m1 = 2 kg

m2 = 4 kg

are connected with rope. We pull the heavier of the two objects with force F = 24 N

Find a. What is the force F1 in rope ?

F = ( m1 + m2 )*a - > a = F/( m1 + m2 )

the above formula gives the correct result but as usual my study book has to complicated the matters

Code:

```
__ F1 -F1 __ F
|m1|----->----<-----|m2|--------->
|__| |__|
```

According to my study book an object with mass m1 is being pulled by the force of rope F1 to the right with acceleration a

An object with mass m2 is being pulled by force

F - F1 = m2 * a

Due to Newton's third law object with m1 should also be pulled with force F, but here we have force F1 instead. HUH?!

I hope someone can finally clear these thigs up for me since I'm truly stuck and can't move on until I get this

thank you very much