Question

calculating the force of friction
the net force acting on the box is 18 n. what is the
force of friction?
$f_p = 22$ n
$f_f = ?$ n

• $-22$ n
• $-4$ n
• $4$ n
• $22$ n

Explanation:

Step1: Define net force formula

Net force $F_{net} = F_p + F_f$, where $F_p$ is applied force, $F_f$ is friction force.

Step2: Rearrange to solve for $F_f$

$F_f = F_{net} - F_p$

Step3: Substitute given values

$F_f = 18\ \text{N} - 22\ \text{N}$

Answer:

-4 N