Question

the forces acting on a child sitting in a seat are described by the free - body diagram shown. what is the net force acting on the child? -100 n 0 n 100 n 200 n f_n = 100 n f_g = -100 n

Explanation:

Step1: Recall net - force formula

The net force $F_{net}$ is the sum of all forces acting on an object. If we have two forces $F_1$ and $F_2$, then $F_{net}=F_1 + F_2$.

Step2: Identify the given forces

Here, $F_N = 100\ N$ (normal force acting upwards) and $F_g=- 100\ N$ (gravitational force acting downwards).

Step3: Calculate the net force

$F_{net}=F_N+F_g=100+( - 100)=0\ N$.

Answer:

0 N