I hope this helps you
boys+4=girls
boys+girls=26
boys+boys+4=26
2.boys=22
boys=11
girls=15
-13+21=14
The temperature is 14 degrees during your afternoon.
I would say
Balanced forces result in constant velocity: phase 3
Unbalanced force causes change in velocity: phase 4
The more unbalanced the forces are, the greater the changes in velocity is: phase 5
Hope this helps