For my students: To download the file and video for analysis using Tracker, right-click the file here...

To verify the equation F = ma, where F is the resultant force on an object, m is the mass of the object and a is the acceleration, this is one of the ways to do so:

**Equipment:**

1. Motion Sensor

2. Datalogger

3. Cart with variable mass

4. End Stop

5. Pulley with clamp

6. Hanger Mass Set

7. String (about 1.2 m)

For a system of a cart of mass *M* on a horizontal track that is connected to a hanging mass *m* with a string over a pulley, the net force * F* on the entire system (cart and hanging mass) is the weight of hanging mass.

*=*

**F***m*(no friction assumed).

**g**According to Newton’s Second Law, *m**g = **(M**+ m**)*** a. **We will try to prove experimentally that this is true in the video below.