Question

15 kg Box experiences too hard auto forces on a frictionless surface as shown below. What is the objects acceleration? Use a positive negative sign to indicate the direction.

Answer 1

We need to analyze the system

$-35+25=ma$

where m is the mass of the box

m=15kg

$-35+25=15a$

then we can isolate the acceleration

$a=\frac{-35+25}{15}=-0.67\text{ }\frac{m}{s^2}$