Question

the image shows two opposite forces acting on a rolling cart, what can we say is true about the affect of the forces on the cart? a it cannot be determined without knowing which man is stronger. b it cannot be determined because one man is taller than the other. c the forces are unbalanced, and net force on the cart moves it to the left. d the forces are unbalanced, and net force on the cart moves it to the right.

Explanation:

Step1: Calculate net - force

The two forces are acting in opposite directions. Let the force to the right be positive ($F_1 = 125N$) and the force to the left be negative ($F_2=- 50N$). The net - force $F_{net}=F_1 + F_2$.
$F_{net}=125+( - 50)=125 - 50 = 75N$

Step2: Determine direction of motion

Since the net - force $F_{net}=75N>0$, the direction of the net - force is to the right. Unbalanced forces cause an object to accelerate in the direction of the net - force.

Answer:

D. The forces are unbalanced, and net force on the cart moves it to the right.