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I need help with the remaining 3 sections! Two stacked boxes are sliding along an ice rink with an initial velocity

`vec(v)_(0)`

to the right. You are trying to stop the boxes so you exert a force

`vec(F)_(Y1)`

on the top box as indicated in the figure. The magnitude of the force that you exert is variable, and follows the equation:

`F_(Y1)=F_(0)e^(-bt)`

with

`F_(0)`

and

`b`

constants, and

`t`

the time since you began exerting the force. Because the boxes are sliding on ice, the friction between box 2 and the ground is negligible. There is friction between the two boxes, and they are observed to accelerate together as you exert the force to slow them down. Note: This problem will be much easier if you solve everything symbolically before you substitute numerical values for the parameters. Use the following values for the parameters:

```
m_(1)=6.7kg
m_(2)=3.8kg
\phi =27.5\deg
F_(0)=105N
b=0.14s^(-1)
t_(1)=1.8s
v_(0)=7.9(m)/(s)
```

Acceleration Speed of Boxes Determine the common speed of the two boxes at

`t_(1)`

.

`v_(1)=`

Hint: Friction force of box 1 on box 2 Stopping Time