Acceleration of the Laundry Cart| Newton’s Second Law of Motion: Concept of a System| Dynamics| College Physics| Problem 4.3

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 net\:Force=mass\times acceleration. For this particular problem, we are solving for the acceleration. Hence, the formula for acceleration is 

acceleration=\frac{net\:force}{mass}

In symbols, that is 

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

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

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

a=13.33\:m/s^2

The acceleration of the laundry cart is about 13.33 meters per second per second.