Answer:
The answer to your question is -28.8N
Explanation:
Data
F1 = 75N up
F2 = 150 N up
mass of the kid = 20 kg
weight of the kid = x down
dog's force = ? down
Process
1.- Calculate the weight of the kid
k = 9.81 x 20
= 196.2 N
2.- Write an equation of this situation
ballon 1 + ballon 2 - weight of the kid - force of the dog = 0
3.- Substitution
75 + 150 - 196.2 - force of the dog = 0
Solve for force of the dog
force of the dog = 196.2 - 75 - 150
= -28.8 N
It is negative because it is pulling down.
