College Physics 4.3 – The acceleration of a laundry cart pushes by a cleaner


A cleaner pushes a 4.50-kg laundry cart in such a way that the net external force on it is 60.0 N. Calculate its acceleration.


Solution:

From Newton’s second law of motion, we know that

\text{net Force}=\text{mass}\times \text{acceleration}

For this particular problem, we are solving for the acceleration. Hence, the formula for acceleration is 

\displaystyle \text{acceleration}=\frac{\text{net force}}{\text{mass}}

In symbols, that is 

\displaystyle \text{a}=\frac{\sum \text{F}}{\text{m}}

Substituting the given values and solving for the unknown, we have

\displaystyle \text{a}=\frac{60.0\:\text{N}}{4.50\:\text{kg}}

\text{a}=13.33\:\text{m/s}^2

The acceleration of the laundry cart is about 13.33 m/s2.