Question

physics 1 unit 2 practice test
a shopper pulls on a 13 kg television from one direction while another shopper pulls on the television in the opposite direction. which of the following formulas should be used to calculate the net force acting on the object?
$f_{net}=f_{a2}-f_{a1}$
$f_{net}=ma$
$f_{g}=mg$
$f_{fk}=(mu_{fk})(f_{n})$

Explanation:

Step1: Recall Newton's second law

Newton's second law states that net force \(F_{NET}\) is related to mass \(m\) and acceleration \(a\) by the formula \(F_{NET}=ma\).

Step2: Analyze each option

• \(F_{NET}=F_{A2}-F_{A1}\) is just the difference of two forces, not the general formula for net force.
• \(F_{NET}=ma\) is Newton's second law which gives the net force acting on an object.
• \(F_{g} = mg\) is the formula for gravitational force, not net force.
• \(F_{FK}=(\mu_{FK})(F_{N})\) is the formula for kinetic frictional force, not net force.

Answer:

\(F_{NET}=ma\) (the second option)